SB Chevy Intake Gaskets LARGE RACE PORTS

The SB Chevy Intake Gaskets LARGE RACE PORTS (MPN 1267) are engineered for Small Block Chevrolet engines demanding maximum flow through oversized intake manifold ports. These gaskets are essential for builders and performance enthusiasts who have ported their cylinder heads beyond stock dimensions or who run aftermarket intake manifolds with enlarged port openings. When you upgrade to large race ports, a standard intake gasket becomes a serious weak point—the port mismatch creates turbulence, vacuum leaks, and lost cylinder-to-cylinder distribution that undermines your breathing modifications.

These gaskets feature a 1.38 x 2.28 inch rectangular port design with a composite construction and 1.2 inch thickness, providing both durability and precise sealing geometry across the large race port footprint. The composite material resists heat soak and fuel vapors better than traditional cork, while maintaining a controlled crush to prevent gasket blowout under boost or high cylinder pressures. At just 0.5 lbs and measuring 3.95 x 0.65 x 22.05 inches, the kit ships compact yet contains all gaskets needed for a complete intake installation, ensuring port-to-port consistency and eliminating dead spots in fuel distribution that plague mismatched OEM gaskets.

These SB Chevy intake gaskets are indispensable for carbureted and EFI small blocks fitted with competition manifolds, tunnel-ram setups, or big-port cylinder heads. Racers, street performance builders, and engine shops working on naturally aspirated or supercharged Small Block Chevrolet engines benefit from the precise port match and reliable seal that prevent vacuum leaks and fuel distribution problems. Installation is straightforward during intake manifold assembly—simply position the gaskets with the large race ports aligned to your manifold opening, torque per OEM specifications, and confirm a dry seal with no seepage at idle or under load.