Engine Cylinder Head Weld-On Fittings 454-R EFI intake manifold is

454-R EFI intake manifold is designed for competition 396-502 big-block Chevy engines with rectangular-port cylinder heads

these components give you stronger valve-train stability and smoother operation for spirited street driving without race-only complexity

Double Adj

s Rear Cradle Bushings reduce cradle movement over the stock rubber bushings

Engine Cylinder Head Weld-On Fittings 454-R EFI intake manifold isuse recommended springs to match your camshaft. Exhaust flange is extended . 300" from stock (same as Mopar Stage 6) featuring dry exhaust bolt holes with Heli Coil thread inserts. 72cc combustion chamber volume. Cylinder head part #77939 comes bare with valves only.