Performer RPM 4V/Q-JET Marine Intake Manifold for Big-Block Chevy-Oval port

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Edelbrock Performer RPM Marine Q-Jet Intake Manifold for 396-502 Big-Block Chevrolet w/Oval Port Heads. All Cooling Water Passages are Lined with Brass to Prevent Corrosion. Accepts Q-jet or 4150-Style Square-Bore Marine Carburetor. Non-EGR
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Edelbrock part #2561 Performer RPM Q-Jet marine intake manifold is designed for spread-bore carbs but also works with Edelbrock square-bore carbs without adapter on street 396-502 c.i.d. Chevy V8's with large oval-port (1975 and earlier) heads. This marine intake features brass lined water passage and brass flange inserts to cover rear water openings. No provisions for hot air style chokes. Accepts divorced choke, late-model waterneck, air-conditioning, alternator and HEI equipment.

Documents & Installation Notes


Availability Available
Application Application Specific
UPC 00085347025619
Series Marine
Grade Type Performance
Gasket Or Seal Included No
Vehicle Model Chevrolet
Availability Note Available to Order
Warranty 12 Months
Ec Basic Operating Rpm Range 1500-6500 RPM
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Recommended intake gasket: Edelbrock #7203; Will not fit under stock hood of Corvette, 1964-67 Chevelle, or 1967-81 Camaro.; Manifold height: A-4.45", B-6.0"; Carb pad height: 5.22"; Carb recommendations: Edelbrock AVS2 or Performer Series 650-800 cfm; Port exit dimensions: 1.60"w x 1.94"t; Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant #1076, DO NOT USE END SEALS GASKETS.; Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum.
Center Maximum Height 5.220 in
CNC Ported No
Finish Satin
Front Maximum Height 4.450 in
Material Aluminum
Rear Maximum Height 6.000 in
Single Or Dual Plane Type Dual