Designed for 1965-79 Pontiac 326-455 c.i.d. V8s (except Ram Air V and 265/301 V8s). Provides great throttle response for performance you can feel. #2156 is stock replacement/ street legal part for 326, 350, 389, 400 and 455 V8s with OEM 4-bbl. carb.; 1966-72 (1973 non-CA); except stock equipped EGR. #3756 is stock replacement/street legal part for 326, 350, 389, 400 and 455 V8s with OEM 4-bbl. carb.; 1973-79 with EGR. Edelbrock Performer Pontiac Intake Manifold 21563 Black - Non-EGR - Idle-5500rpm - Pontiac 326-455 - 4 bbl Carb - Excpt RamAir V - Use Throttle Brkt.(8015) - Street Legal - Street/Hi Performance UseFor Idle to 5500 RPM Street-Driven PerformanceDual-Plane Low-Rise Intake w/180 deg. Firing OrderPatented Runner Design Ensures Broad Torque CurveExcellent Throttle Response and Mid-Range Power50-State Street Legal if Correct Carburetor UsedApplications include: Bonneville, Catalina, Executive, Firebird, Firebird Trans Am, Grand Am, Grand Lemans, Grand Prix, Grand Safari, Grandville, Gto, Lemans, Safari, Star Chief, Tempest, Ventura, Pontiac, 1979, 1978, 1977 Pit Stop USAoffers Edelbrock Performer Pontiac Intake Manifold 21563 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Intake Manifolds, Edelbrock Intake Manifolds - Pontiac.