1988-1995 GMC K3500 HEADERS (FLOWTECH PERFORMANCE HEADERS)

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Priced from:

$151.67 - $393.73
Product #: 16328G Brand: Flowtech
Customer Rating: 4.2 of 5 stars

Flowtech Performance Headers - 277850

SKU #: JCW-277850 Mfr #: 31500FLT
  • Flowtech II Series
  • Silver Ceramic Coated Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.5 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech II Series
  • Silver Ceramic Coated Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.5 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$345.51

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 5 others
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • High Sierra
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • Sierra Classic
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • Sierra Grande
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • Sierra Grande
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • Base
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • High Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
  • Sierra Classic
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter

Flowtech Performance Headers - 200048

SKU #: JCW-200048 Mfr #: 11500FLT
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.5 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.5 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$182.66

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 5 others
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • High Sierra
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • Sierra Classic
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • Sierra Grande
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • Sierra Grande
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • Base
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • High Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
  • Sierra Classic
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Automatic Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
    4WD, Standard Transmission, Without A.I.R. Tubes, Req. A/C Bracket PN[10042FLT] Starter
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT] Starter

Flowtech Performance Headers - F3111508

SKU #: JCW-F3111508 Mfr #: 11508FLT
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 2.5 in.
  • Primary Tube Diameter: 1.5 in.
  • Head Flange Thickness: 0.31 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 2.5 in.
  • Primary Tube Diameter: 1.5 in.
  • Head Flange Thickness: 0.31 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$163.06

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Sierra SLE, Sierra SLX, and Sierra SLX
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Sierra SLE
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Will Fit Dart Sportmans II Angle Plug Heads
    4WD, Standard Transmission, Will Fit Dart Sportmans II Angle Plug Heads
  • Sierra SLX
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Will Fit Dart Sportmans II Angle Plug Heads
    4WD, Standard Transmission, Will Fit Dart Sportmans II Angle Plug Heads
  • Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Will Fit Dart Sportmans II Angle Plug Heads
    4WD, Standard Transmission, Will Fit Dart Sportmans II Angle Plug Heads

Flowtech Performance Headers - F3111504

SKU #: JCW-F3111504 Mfr #: 11504FLT
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.63 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.63 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$158.20

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Sierra SLX, Sierra, Sierra SLE and 2 others
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Sierra SLX
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra SLE
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra SL
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra SLT
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, With Oxy. Sensor, Use Reducer PN[10110FLT] For 3 in. Flange

Flowtech Performance Headers - 277851

SKU #: JCW-277851 Mfr #: 31530FLT
  • Flowtech I Series
  • Metallic ceramic coated Color/Finish
  • Product Fit: Direct Fit
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Metallic ceramic coated Color/Finish
  • Product Fit: Direct Fit
  • Material: Steel
  • Number of Cylinders: 8
$393.73

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 1 other
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • High Sierra
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • Sierra Classic
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • Sierra Grande
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Must Use Original Factory Big Block Engine Frame Mounts & Hardware

Flowtech Performance Headers - F3131506

SKU #: JCW-F3131506 Mfr #: 31506FLT
  • Silver Ceramic Coated Color/Finish
  • Product Fit: Minor Modifications
  • Material: Steel
  • Number of Cylinders: 8
  • Silver Ceramic Coated Color/Finish
  • Product Fit: Minor Modifications
  • Material: Steel
  • Number of Cylinders: 8
$341.76

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 5 others
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • High Sierra
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Classic
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Grande
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Grande
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Base
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • High Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Classic
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange

Flowtech Performance Headers - F3111506

SKU #: JCW-F3111506 Mfr #: 11506FLT
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.63 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.63 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$151.67

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 5 others
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • High Sierra
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Classic
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Grande
  • 8 Cyl 6.6L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Grande
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Base
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • High Sierra
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
  • Sierra Classic
  • 8 Cyl 5.7L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange
    4WD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Req. A/C Bracket PN[10042FLT], Use Reducer PN[10110FLT] For 3 in. Flange

Flowtech Performance Headers - 200056

SKU #: JCW-200056 Mfr #: 11530FLT
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.75 in.
  • Head Flange Thickness: 0.31 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
  • Flowtech I Series
  • Black Color/Finish
  • Product Fit: Minor Modifications
  • Collector Attachment Style: Weld-On
  • Collector Diameter: 3 in.
  • Primary Tube Diameter: 1.75 in.
  • Head Flange Thickness: 0.31 in.
  • Port Shape: Round
  • Warranty: 90-day Flowtech warranty
  • Material: Steel
  • Number of Cylinders: 8
$178.15

Per Kit

Ships: 1-2 Business Days

Add to Cart
See Fitment Details for Base, High Sierra, Sierra Classic and 1 other
  • SUBMODEL
  • ENGINE
  • FIT NOTE
  • Base
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • High Sierra
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • Sierra Classic
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
  • Sierra Grande
  • 8 Cyl 7.4L
  • 4WD, Automatic Transmission, Without A.I.R. Tubes, Must Use Original Factory Big Block Engine Frame Mounts & Hardware
Overall Rating
4.2 out of 5
4.2 out of 5
Open Ratings Snapshot
Rating breakdown 13 reviews
5 Stars
8
4 Stars
2
3 Stars
2
2 Stars
0
1 Star
1
Ease of Use/Installation
1 out of 5
Quality/Construction
3 out of 5
10 of 13(77%)reviewers would recommend this product to a friend.
Product ReviewsWrite a review
Overall Rating
3 out of 5
3 out of 5
OK header, good price, poor fit...
December 8, 2013
the Wrench
Location: usa
How often do you shop at JC Whitney.com? Multiple Times a Year
Ease of Use/Installation
1 out of 5
1 out of 5
Quality/Construction
3 out of 5
3 out of 5
" The JCW search engine took me right to this page for 1980 El Camino SS. I don't see any note as to whether or not they fit Auto/manual transmission vehicles, so I tried them. I got them to fit in the car with a little dinging with a ball peen hammer to clear the frame rails, VERY tight on the passenger side!!! Even with a G-force dual exhaust crossover transmission mount I couldn't route the right side exhaust past the clutch linkage on my 4 speed tranny vehicle. I had to take it to a muffler shop and have them specially fabricate a right side collector adapter to clear the clutch linkage. The shop guy says I should have ordered an earlier B body set... oh well. "
-2points
0out of 2found this review helpful.
Was this helpful?helpful0unhelpful2
Overall Rating
5 out of 5
5 out of 5
great buy
June 10, 2011
Ralph
Location: coralsprings, FL.
How often do you shop at JC Whitney.com? Multiple Times a Year
" installed into a 1978 El Camino,350 Eng. picked up a set of ramps and the rest is simple,removed the starter,had to move the tranny line over a bit and bingo it's in, sounds great. "
Pros: all good.every thing fit
Cons: the black paint,dont last long
+7points
12out of 17found this review helpful.
Was this helpful?helpful12unhelpful5
Overall Rating
1 out of 5
1 out of 5
not for 4x4
March 9, 2011
Anonymous
" don't buy for a 4x4 Chevy front drive-train gets in the way unless ur guna cut and re-weld them "
Pros: fits passenger side
Cons: doesnt fit driver side of 89 chevy 4x4
+12points
14out of 16found this review helpful.
Was this helpful?helpful14unhelpful2
Overall Rating
4 out of 5
4 out of 5
So Far, A pain.
March 6, 2011
Anonymous
Location: Tappahannock, VA
How often do you shop at JC Whitney.com? Multiple Times a Year
" I haven't ran my car yet, (79 Ford F-150: 5.0 302), but in order to bolt the headers on...i had to take out the starter, the support bar on the way to the trans (from the front of the truck), and disconnect the clutch. even with all that, the paint still got scratched up, and messed up.
I'm not sure if you are buying these for the paint job...(i wasn't, so it didn't bother me) but in my car at least, it's not gonna survive.
the directions were fairly ambiguous. and not tailored to your vehicle, even though they are "custom fitted". i had to install the passenger side header from under the car which had to be jacked up, like the directions said. but i had to install the drivers side from up top, while those were supposed to be installed from the bottom as well.
I bought the heartthrob exhaust kit made specifically for long tube headers...and now the kit doesn't fit because the collecters on the headers sit too low, and the outreaching pipes can't clear the transmission support bar.
Over all, these are a so-so buy, again for my type of vehicle at least. the effort put in is absolutely ridiculous, and it's now thrown off the rest of my purchase. I wouldn't recommend buying these if you have the same vehicle as me, but im sure they work for other people. "
Pros: Look good, everything is aligned right. bolt holes match up. nothing was missing.
Cons: BARELY fit. plus now, my exhuast pipes don't fit.
+24points
30out of 36found this review helpful.
Was this helpful?helpful30unhelpful6
1-4 of 13