Header SBC Modified 1-5/8in 3in Col

The Header SBC Modified 1-5/8in 3in Col from Schoenfeld is a high-performance exhaust header engineered for small-block Chevrolet (SBC) engines undergoing serious modifications. This header is designed for builders who demand improved scavenging efficiency and increased horsepower output without sacrificing reliability. Whether you're building a street machine, weekend warrior, or track-focused engine, this header addresses the critical need for efficient exhaust gas evacuation—the foundation of any performance combination.

The 1-5/8-inch primary tube diameter is sized to optimize scavenging velocity across a wide RPM range, preventing backpressure buildup that kills mid-range torque and peak horsepower. The 3-inch collector consolidates exhaust flow smoothly, minimizing turbulence and heat loss as gases transition into your downstream piping system. Schoenfeld's modified design accommodates common engine bay clearance challenges while maintaining ideal header tube geometry and bend radii. The unit's 29.4-pound weight reflects quality construction without excessive mass, and its compact 20 x 10 x 41-inch footprint fits tight installations where stock or universal headers create packaging conflicts.

This header excels in modified SBC applications—particularly Chevrolet small-blocks with aftermarket cylinder heads, cam profiles, and induction systems seeking measurable power gains. Serious street and strip builders rely on Schoenfeld's reputation for precision tube work and consistent fitment. Installation requires proper exhaust hangers, quality gaskets, and clearance verification under your specific hood and chassis configuration. Pair this header with a well-tuned carburetor or fuel injection system and a free-flowing exhaust for optimal results. The modified geometry makes it ideal for compact engine bays where traditional headers bind or interfere.