1-5/8 Flange SBC Crate Motor

The 1-5/8 Flange SBC Crate Motor header flange by SCHOENFELD is a precision-engineered exhaust manifold mounting component designed for small-block Chevrolet engines. This flange serves as the critical interface between your engine's cylinder head and primary exhaust tubing, making it essential for anyone building a high-performance SBC platform or restoring a classic muscle car. Whether you're constructing a street engine, competition build, or crate motor installation, this flange ensures proper exhaust gas evacuation and structural integrity under sustained load.

Manufactured to OEM specifications, the 1-5/8 flange utilizes a standard bolt pattern compatible with small-block Chevy cylinder heads and accepts 1-5/8-inch primary tubing diameter. The flange dimensions of 3.15 x 0.55 x 18.8 inches provide ample surface area for secure bolting while maintaining optimal flow characteristics for exhaust evacuation. At just 1.76 lbs, this component adds minimal weight to your engine bay while delivering the durability required for both street and strip applications. The design accommodates standard gaskets and header hardware, allowing seamless integration into custom or stock exhaust systems.

This flange is ideal for builders working with 283, 327, 350, and 400 cubic inch small-block Chevrolet engines in both carbureted and fuel-injected configurations. Installation requires basic mechanical knowledge and standard hand tools; torque all mounting bolts to manufacturer specifications to prevent exhaust leaks. Compatibility extends across generations of SBC platforms, from first-gen LS swaps to traditional small-block applications, making this a versatile choice for any Chevy engine project seeking reliable exhaust manifold coupling.