The terrific Cyclone+Plus is a step up from the Cyclone. Due to its slightly taller height, it can provide more power and torque. It is about 3/8" taller than the Cyclone. It also has a rear water crossover, the only SB Chevy manifold made by anyone with this feature, nitrous bosseses and a square bore carburetor flange. It comes in versions with or without intake gaskets, a tube of gasket sealer, 12-point stainless bolts, and all necessary pipe plugs.