- Jegs
- Fuel, Carbs & Intakes
- Intake Manifold
- Carburetor Intake Manifolds
- Edelbrock RPM Air-Gap Manifold
Edelbrock RPM Air-Gap 2-R Intake Manifold BB-Chevy 396-502 w/rectangular port cylinder heads
350-75621



Items You Need
Big Block Chevy
Designed for Chevy 396-502 street applications with high-performance rectangular port heads, the RPM Air-Gap incorporates the race-winning technology that's been used on the Victor Series competition intakes. Includes rear water outlets, two distributor clamp locations, and nitrous bosses. Accepts all late-model alternator and A/C brackets for the street. For square-bore carburetors only. No provision for exhaust-heated chokes and no exhaust crossover. Will not fit under stock hood of Corvette, 1965-67 Chevelle, or 1970-81 Camaro.
Installation NotesCarb Recommendations
Specifications:
The First Dual-Plane Manifold with the Powerful Air-Gap Design Edelbrock has brought race-inspired technology to the street, again! The RPM Air-Gap is a dual-plane intake manifold with a dropped plenum divider that separates the intake runners from hot engine oil in the lifter valley. This provides a cooler, denser air/fuel charge for more power.

Does Edelbrock 75621 fit your vehicle?
1980 CHEVROLET C20 SUBURBAN
- Liter: 7.4
- SubModel: CUSTOM DELUXE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: S
1981 CHEVROLET C30
- Liter: 7.4
- SubModel: CHEYENNE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1973 CHEVROLET CORVETTE
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Will Not Fit Under The Stock Corvette Hood~ Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Z
1980 CHEVROLET C10
- Liter: 7.4
- SubModel: BIG TEN
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1979 GMC K1500
- Liter: 7.4
- SubModel: SIERRA GRANDE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: S
1968 GMC K25/K2500 SUBURBAN
- Liter: 6.5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 396
- Engine Type: V8 ( 6.5L / 396 )
- Engine Vin: Y
1967 PONTIAC PARISIENNE
- Liter: 6.5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 396
- Engine Type: V8 ( 6.5L / 396 )
- Engine Vin: -
1975 CHEVROLET C10
- Liter: 7.4
- SubModel: CHEYENNE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Z
1970 GMC K15/K1500 PICKUP
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: E
1972 GMC K35/K3500 PICKUP
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: E
1980 GMC C2500 SUBURBAN
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Recommend Edelbrock Gasket PN[7202] for Manifold Gasket~ Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1969 CHEVROLET BROOKWOOD
- Liter: 6.5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Polished Finish; Non-EGR; 1500-6500rpm; For 4 bbl Carb; For High-Perf. Rect. Port Cyl. Heads Only; Not Legal For Use On Pollution Controlled Vehicles~ For Pre-Pollution Controlled Vehicles Or Engine Swaps
- CUI: 396
- Engine Type: V8 ( 6.5L / 396 )
- Engine Vin: -
Motor Vehicles
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Tools:
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.