Intake Manifolds - Big Block Chevy Oval Port

AFR proudly presents the Magnum Intake Manifold, the ultimate power upgrade for your Big Block Chevy engine. Crafted with precision and engineered to perfection, this manifold is the key to unlocking a new level of performance for your street vehicle. Designed to seamlessly integrate with our acclaimed AFR Magnum Oval port cylinder heads, this manifold promises a hassle-free enhancement to your engine’s capabilities. Say goodbye to the painstaking task of port matching, as it is a direct bolt-on solution for our select cylinder heads*. The Magnum Intake Manifold utilizes a dual-plane design, featuring runners that are custom-tailored for high-horsepower applications thriving in the 1800-6200 RPM range. Elevate your driving experience today with AFR’s Magnum Intake Manifold – where power meets precision. 

• Carb Flange Height: Front: 5.22” Middle: 5.39” Rear: 5.57”
• 1800-6200 RPM optimal operating range
• Designed for a standard/ stock block height
• 4150 carburetor flange *Best fit for AFR Magnum Oval Port 265cc, 290cc, and 300cc cylinder heads
• May require porting to match other cylinder heads.

Big Block Chevy Oval Port "PowerGap" Raised Runner Intake Manifold, Black

• RPM Range: 1500-6500
• Engine Make/Size: Chevy Big Block (396-502)
• Number Of Carbs: One
• Emission: N/A
• Cylinder Head Type: Oval Port- Large

PowerGap "HP" series Oval port intake for 454 Marine based engines. This is a great performance upgrade to standard Dual Plane intake manifolds for your 454 Big Block Oval port cylinder head application, Power range is between 15000 rpms to 6500 rpms. This manifold features raised runner plenum area that allows air to pass under the intake plenum which reduces engine heat transfer producing a cooler denser intake air/fuel charge resulting in a increase in power and torque output. Features include dual distributor hold downs.

RPM Range: 1500 to 6500

• Crosswind Intake Manifold
• 1500-6500 RPM Range
• Oval Ports
• Black Painted Finish
• Air Gap Design
• Allows Ambient Air To Pass Beneath The Plenum
• Additional Cooling To The Intake Charge
• Four Corner Water Ports
• Dual Distributor Holddowns

Big Block Chevy Oval Port "PowerGap" Raised Runner Intake Manifold, Semi-Polished

• RPM Range: 1500-6500
• Engine Make/Size: Chevy Big Block (396-502)
• Number Of Carbs: One
• Emission: N/A
• Cylinder Head Type: Oval Port- Large

PowerGap "HP" series Oval port intake for 454 Marine based engines. This is a great performance upgrade to standard Dual Plane intake manifolds for your 454 Big Block Oval port cylinder head application, Power range is between 15000 rpms to 6500 rpms. This manifold features raised runner plenum area that allows air to pass under the intake plenum which reduces engine heat transfer producing a cooler denser intake air/fuel charge resulting in a increase in power and torque output. Features include dual distributor hold downs.

RPM Range: 1500 to 6500

• Crosswind Intake Manifold
• 1500-6500 RPM Range
• Oval Ports
• Machine Polished Finish (Brighter than satin, but not fully polished)
• Air Gap Design
• Allows Ambient Air To Pass Beneath The Plenum
• Additional Cooling To The Intake Charge
• Four Corner Water Ports
• Dual Distributor Holddowns

Big Block Chevy Oval Port Stealth Intake Manifold 396ci-502ci

• High Rise/Dual Plane Design
• Port Size: 1.84” height 1.64" width
• Height: Front 4.75", Rear 5.75"
• Power band: Idle-6500 RPM
• Machined for Standard Deck Blocks
• 4150 Style Square Bore Mounting Flange
• Weiand Nostalgia Series Intake Manifold 

RPM Range: Idle to 6500

Marine Intake Manifold for 396-502 Chevrolet with large oval-port (1975 and earlier)

• RPM Range: 1500-6500
• Engine Make/Size: Chevy Big Block (396-502)
• Number Of Carbs: One
• Emission: Without EGR
• Cylinder Head Type: Oval Port- Standard

Edelbrock Marine Intake Manifolds offer the same legendary performance you trust in a product designed specifically for the demanding conditions found in marine application use. The new marine intake manifold features a brass lined front water crossover and two brass flange inserts to cover the rear water openings in the cylinder heads that protect the aluminum from salt water corrosion

Installation Notes:
• Port exit dimensions: 1.61" x 1.93"
• Manifold height: (A) 4.45" , (B) 6.00"
• Accepts square-bore and spread-bore carbs.
• Requires electric choke carb, Has no provisions for exhaust heated chokes.

Carburetor Recommendations:
• Edelbrock 600cfm Marine Carburetor: 880-1409
• Edelbrock 750cfm Marine Carburetor: 880-1410

"SE" Sport Dual Plane Big Block Chevy Oval Port Intake Manifold - Machine Polished

If you're looking for a manifold that's got it all then the "SE" Sport Intake is your answer. Its dual plane design assures that from idle to planing speeds you'll experience a power burst with incredible mid-range acceleration. This manifolds dual plane design lends itself to increased fuel efficiency as well. Note: the polishing is a "machine/semi polish" and not a mirror finish type polish.

RPM Range: 1500 to 6500

"SE" Sport Dual Plane Big Block Chevy Oval Port Intake Manifold - Satin Finish

If you're looking for a manifold that's got it all then the "SE"Sport Intake is your answer.  Its dual plane design assures that from idleto planing speeds you'll experience a power burst with incredible mid-rangeacceleration.  This manifolds dual plane design lends itself to increasedfuel efficiency as well.

RPM Range: 1500 to 6500

Big Block Chevy Oval Port Performer RPM

• RPM Range: 1500-6500
• Engine Make/Size: Chevy Big Block (396-502)
• Number Of Carbs: One
• Cylinder Head Type: Oval Port- Large
• Finish: Satin
• Square Bore 4-bbl Carb Flange

The Original. Our proven, race-wining Air-Gap design in a dual-plane manifold. Designed for Chevrolet V-8s, the award- winning RPM Air-Gap incorporates the same race-winning technology that's used on our competition intakes. The air-gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. Includes rear water outlets, two distributor clamp locations and nitrous bosses.

Installation Notes:
• Port exit dimensions: 1.60" x 1.94"
• Manifold height: (A) 4.45" , (B) 6.00"

Carburetor Recommendations:
• Edelbrock Performer 750cfm Carburetor
• Edelbrock Performer 800cfm Carburetor
• Edelbrock Thunder Series AVS 800cfm Carburetor


• carb will work with non-EGR system
• carb has no provision for evaporative canister
• carb acceptable to factory cruise control
• carb has manual choke only

Big Block Chevy Oval Port Polished RPM Air-Gap

The Original. Our proven, race-wining Air-Gap design in a dual-planemanifold. Designed for Chevrolet V-8s, the award- winning RPM Air-Gapincorporates the same race-winning technology that's used on our competitionintakes. The air-gap design features an open air space that separates therunners from the hot engine oil resulting in a cooler, denser charge for morepower. Includes rear water outlets, two distributor clamp locations and nitrousbosses.

RPM Range: 1500 to 6500

Big Block Chevy Oval Port RPM Air-Gap

The Original. Our proven, race-wining Air-Gap design in a dual-planemanifold. Designed for Chevrolet V-8s, the award- winning RPM Air-Gapincorporates the same race-winning technology that's used on our competitionintakes. The air-gap design features an open air space that separates therunners from the hot engine oil resulting in a cooler, denser charge for morepower. Includes rear water outlets, two distributor clamp locations and nitrousbosses.

RPM Range: 1500 to 6500

Big Block Chevy V-8 Oval Intake Port Performer Manifold (Optional Hard Coat Anodizing Available)

• Engine Make/Size: Chevy Big Block (396-502)
• RPM Range: Idle -5500
• Number Of Carbs: One
• Cylinder Head Type: Oval Port- Small

Performer manifolds are dual-plane, low-rise intake manifolds with a 180° firing order and patented runner design that you won't find in other brands. This patented design greatly improves torque over a wide rpm range, especially off-idle through the mid-range. Throttle response is excellent Performers are ideal for stock or mildly modified marine engines. These manifolds can be ordered hard anodized to prohibit corrosion in saltwater environments.

Carb Recommendations/Notes:
• OE 4-bbl Carburetor
  Uses automatic divorced choke rod with Q-Jet Carb


• Edelbrock 600 cfm Performer Carburetor
• Edelbrock 650 cfm Thunder Series AVS Carburetor
• The following all work well for towing over 10,000 lbs:
  • Edelbrock 750 cfm Performer Carburetor
  • Edelbrock 800 cfm Performer Carburetor
  • Edelbrock 800 cfm Thunder Series AVS Carburetor