Designed for 1986 and earlier 262-400 cubic-inch Chevys, the Performer EPS dual-plane manifold is optimized to deliver superior performance with Edelbrock square-bore Performer Series or Thunder Series AVS carburetors. This small-block Chevy manifold has a runner design that's tuned for peak torque at 3500 rpm on a 350-cubic inch engine and it's ideal for power from off-idle to 5500 rpm. Dyno tests showed gains of 5 hp and 9 ft/lbs of torque over the Edelbrock Performer manifold on a 350 Chevy. From 3000 to 4500 rpm, the increases averaged 5+ ft/lbs.of torque for more performance where you need it most. Includes Oil FillTube (not installed) and matching push-in breather cap. Look for the Performer EPS to up the standards in dual-plane intake manifold design. Match with a dependable Edelbrock square-bore carburetor for maximum performance gains.