Dual-plane Edelbrock Performer EPS intake manifolds deliver dyno-proven horsepower gains from idle to 5,500 rpm, when used with Edelbrock's Performer series square bore or Thunder series AVS carburetors. Dyno tests showed an extra 5 hp and 9 ft.-lbs. over their own Performer manifolds. The secret is in the runner design, which is tuned to produce substantial torque increases in the 3,000-4,500 rpm range--with peak torque at 3,500 rpm. That's power where you need it the most!