This Edelbrock Perfomer EPS intake manifold is designed for 1986 and earlier 262-400 cubic inch Chevy’s. The all -new Performer EPS is optimized to deliver superior performance with Edelbrock square-bore performer series carburetors. This small-block Chevy manifold has all new runner design that’s “tuned” for peak torque around 3500 rpm and 350 inch engine and it’s ideal for power from off-idle to 5500 rpm. Dyno test showed peak gains of 5 hp and 9 ft/lbs. of torque over the Edelbrock Performer manifold #2101 on a 350 Chevy. Across the 3000 to 4500 rpm range, the increases average 5+ ft/lbs. of torque for more performance where you need it most.