Work with Manual or Electric Choke Carb. Compatible with Performer EPS, Performer RPM, RPM Air Gap, Torker Ⅱ and other similar designs. The manifold is not equipped with E.G.R and no exhaust heating throttle is provided. Not suitable under stock Corvette hood. Compatibility: Replacement for Chevy: Chevelle 350, Cheyenne Pickup, Corvette, Silverado, Camaro Replacement for Fo-rd: Mercury Cougar 289 4V; Mustang GT 289; Mach One 351 Windsor; Bronco 531 m Replacement for GM: GMC Pickup / Truck; Pontiac LeMans T37 Replacement for Other Models: Grand Wagoneer, CJ5, J20, Delta 88, Plymouth, GTO, Cadillac Deville