Edelbrock Part # 75254 RPM Air-Gap Dual-Quad #75254 intake manifold is designed for 1955-86 S/B Chevys. This intake stands 1-5/8" taller than the low-profile C-26 intake and offers performance improvements in the 1500-6500 rpm range. The large runners feature our unique Air-Gap design that separates the runners from the hot engine valley for a cooler, denser charge. Also available as a complete carb and manifold kit. Will not fit under stock Corvette hood. This manifold offers our long lasting bright chrome like EnduraShine finish that matches chrome and polished accessories.
Center Maximum Height 4.890 in
CNC Ported No
Front Maximum Height 4.570 in
Rear Maximum Height 5.200 in
Single Or Dual Plane Type Dual Plane
Manifold ht: A-4.57", B-5.20"
Carb pad height: 4.89"
Port exit dimensions: 1.16" x 1.92"
Recommended intake gasket: Edelbrock #7201
Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant #1076, DO NOT USE END SEALS GASKETS.
Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage.
NPT/Pipe thread fittings require the use of Teflon tape or paste on threads to ensure proper seal.
DO NOT OVERTIGHTEN NPT/Pipe fittings, this may cause the aluminum to crack around the fitting boss. NPT/Pipe thread is a tapered thread.
Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum.
H.E.I. will not fit
Carb center-to-center distance: 6-7/16".