Big Block Chevy Intake Manifolds
JEGS 513076 single four-barrel dual-plane high-rise intake manifold is designed for Chevrolet Big Block 396-502 engines. Its dual carburetor bolt pattern allows you to use a spread-bore Quadrajet-style or a square-bore Holley-style carburetor. This cast aluminum unit makes the perfect intake manifold if you're looking for additional torque and horsepower over a stock four-barrel manifold.
JEGS 513075 Dual Plane Intake Manifold Features:
- Fits Big Block Chevy 396, 402, 454, 502 Engines with Oval Port Heads
- Dual Plane High-Rise design for optimum fuel distribution
- Dual Carburetor bolt pattern for spread bore and square bore carburetors
- Includes square bore plate & gasket, choke block off plate with gasket & two 5/16 in.-18 x 3/4 in. L bolts with 1/4 in. Allen Head
- Port exit dimensions: 1.765 in. x 1.900 in.
- Estimated runner length - Shortest: 5 in.
- Estimated runner length - Longest: 7 in.
- Manifold height: (A) 4.750 in., (B) 6.375 in. = Pad Height: 5.560 in.
- Click here to determine carburetor pad height.
- 2 Front and Rear 1/2 in. NPT water outlet ports for additional cooling
- 1 Rear 3/8 NPT vacuum port
- Provisions for dual distributor hold-downs
- Accepts late model alternator, water neck, AC, and HEI
- Provision for divorced or heated choke
- Includes choke plate, gasket & mounting bolts
- Intake gasket port matching is recommended for optimum performance
Note: This intake manifold will not fit under a stock hood on Corvettes.
Additional Recommended Items (Sold Separately):
- Stock/stamped steel valve covers may require 3/16 in. (or thicker) valve cover gaskets. We recommend JEGS 555-210171 for adequate runner clearance.
- Recommended Intake Gaskets 555-210102 for applications with open heat riser and 555-210103 for applications with blocked heat riser.
- Front to Rear Coolant Fittings and Hose
- (2) JEGS Black 90-degree 1/2 in. NPT to -8 AN Fittings - 555-110149
- (2) JEGS Black Straight 1/2 in. NPT to 8 AN Fittings - 555-110109
- (1) JEGS Black Pro-Flo 350 -8 AN Braided Hose, 3 ft. - 555-110920
- (1) JEGS Black Straight -8 AN Max Flow Hose End - 555-110002
- (1) JEGS Black 45-degree -8 AN Max Flow Swivel Hose End - 555-110012
- (2) JEGS Black 90-degree -8 AN Max Flow Swivel Hose Ends - 555-110022
- Carburetor Fuel Inlet Lines & Fittings
- Carburetor Spacers
- Fuel Filters
- Carburetor Linkage, Choke Kits & Components
|JEGS Carb Recommendations/Notes|
|570 CFM||670 CFM||770 CFM|
|Up to 300 HP||300 to 400 HP||400 to 500 HP|
|555-15840||1-1/2" Studs||Suggested for carb and gasket only|
|555-15841||2" Studs||Suggested for carb and 1/2" spacer|
|555-15842||2-1/2" Studs||Suggested for carb and 1" spacer|
|555-15846||3-1/2" Studs||Suggested for carb and 2" spacer|
|Carburetor Base Gaskets|
|555-16125||Open Spread Bore|
|Intake Manifold Bolts|
|555-83205||Big Block Chevy - Standard|
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
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