|Small block Chevy intake. Fits up to 1986. Updated verson of the original performer. Squre-bore mount flange so edelbrock carbs are direct bolt on, Q-jets and other spread bore carbs require adapter. Will accomodate OE brackets and sensors. Designed as an upgrade replacement for stock manifold. Idle to 5500 RPM range, low speed torque, very responsive and good fuel economy. The EPS also produces an additional 10 hp over the old performer. Visit http://www.edelbrock.com/ to check out the rest of edelbrock line up.