Polished Aluminum Big Block Chevy Intake Manifold Dual Plane Air Gap Large Oval Port 396 402 427 454 502 1500-6500 RPM for Street Strip Performance Builds Muscle Cars & Hot Rods 4150 Square Bore BBC

This polished aluminum Big Block Chevy intake manifold is a dual plane air gap performance intake designed for carbureted 396 402 427 454 and 502 cubic inch BBC engines using large oval port cylinder heads. Engineered for 1500-6500 RPM operation, this big block chevy dual plane intake manifold supports broad midrange torque and upper RPM horsepower in hot rod, muscle car, and street strip performance builds. As a 396 402 427 454 502 big block chevy intake manifold designed for performance applications, this aftermarket cast aluminum intake is intended for carbureted combinations using a 4150 square bore flange. This bbc 4 bbl intake manifold accepts standard 4150 and 4160 four barrel carburetors commonly paired with 650-850 CFM configurations depending on engine displacement, cylinder head airflow, camshaft profile, and intended operating RPM range. This large oval port intake manifold is specifically engineered for large oval port Big Block Chevrolet cylinder heads including Mark IV, Gen V, and Gen VI standard deck engines. It is not compatible with rectangular port cylinder heads and is not recommended for small oval peanut port heads due to airflow mismatch. When selecting a big block chevy aluminum intake manifold for performance use, proper port matching and gasket selection are critical for optimal sealing and airflow alignment. With an approximate front height of 4.750 inches and rear height of 6.000 inches, this big block chevy performance intake manifold may require hood clearance verification depending on chassis configuration, carburetor height, spacer selection, and air cleaner assembly. As with most performance-oriented bbc intake manifold upgrades, this is not a stock replacement component and is intended for custom builds and modified engines. This bbc dual plane intake manifold supports a wide range of camshaft configurations including hydraulic flat tappet, hydraulic roller, solid flat tappet, and solid roller combinations commonly used in street performance and bracket racing engines. Compression ratio and camshaft selection should be matched to the overall engine combination, cylinder head flow capability, and intended RPM range for best results. The polished aluminum exterior finish enhances engine bay presentation in muscle cars, pro street builds, classic hot rods, and custom street machines while maintaining the structural rigidity expected from a cast aluminum aftermarket big block chevy intake manifold. Dual distributor hold down provisions, nitrous bosses, and four corner water outlets provide flexibility for performance plumbing and accessory configuration. This aftermarket big block chevy intake manifold for 396 402 427 454 502 engines is shipped in dense expendable foam and double boxed protective packaging to help reduce the risk of transit damage to machined surfaces and polished exterior areas. When installing any 4 barrel carb intake manifold for big block chevy applications, use high quality performance intake manifold gaskets designed for large oval port cylinder heads and confirm carburetor fitment, throttle linkage alignment, and hood clearance prior to final assembly.

• POLISHED ALUMINUM STREET STRIP PERFORMANCE: Polished aluminum dual plane air gap intake manifold designed for Big Block Chevy 396 402 427 454 502 large oval port engines operating in the 1500-6500 RPM range. Built for performance-oriented hot rod, muscle car, and street strip combinations. This is a performance build component, not a stock replacement manifold.
• LARGE OVAL PORT COMPATIBILITY: Engineered specifically for large oval port big block Chevrolet cylinder heads. Not compatible with rectangular port heads. Not recommended for small oval peanut port heads due to airflow mismatch. Designed for standard deck performance builds using carbureted configurations.
• 4150 SQUARE BORE FLANGE DESIGN: Accepts standard 4150 and 4160 square bore 4 barrel carburetors. Commonly paired with 650-850 CFM performance carburetors depending on displacement, camshaft profile, and intended RPM range. Proper carburetor selection, throttle linkage setup, and spacer planning are required for custom builds.
• PRECISION MACHINED PERFORMANCE SPECIFICATIONS: Polished aluminum exterior surfaces with dual plane air gap runner layout for improved charge distribution. Approximate front height 4.750 in and rear height 6.000 in. Features nitrous bosses, dual distributor hold down provisions, and four corner water outlets for flexible performance plumbing configurations.
• DOUBLE BOXED PROTECTIVE PACKAGING: Each manifold is secured in dense expendable foam and double boxed to reduce risk of shipping damage to machined surfaces and polished finish. No installation instructions included. Designed for experienced builders and hot rod enthusiasts. Use high quality performance intake manifold gaskets appropriate for large oval port cylinder heads and verify hood clearance prior to installation.