Header SBC Modified 3 Step

The Schoenfeld Header SBC Modified 3 Step is a purpose-built exhaust header system engineered for IMCA and UMP modified racing applications using small block Chevy powerplants. This pair of headers features 1.625-inch primary tubes that merge into a 3-inch collector, a proven configuration for maximizing exhaust scavenging and horsepower extraction in the competitive modified racing class. Gaskets and hardware are included, eliminating the need for additional ordering and ensuring a complete bolt-on installation.

Constructed from steel and finished in black paint, these headers deliver the thermal durability and corrosion resistance required for sustained track use. The 1.625-inch primary diameter is sized to match the displacement and RPM range typical of small block Chevy modified engines, promoting efficient gas velocity through the primaries before consolidating into the larger 3-inch collector. This stepped approach balances back-pressure and flow characteristics critical to competitive racing performance. At 28.25 lbs per pair, the headers provide a practical balance between structural integrity and weight management on a race-prepared chassis.

Built for IMCA and UMP competitors running small block Chevy platforms, these headers address the specific regulations and performance demands of modified racing. Racers upgrading from stock or inferior exhaust systems will recognize immediate improvements in exhaust gas evacuation and overall engine efficiency. The included gasket set and fasteners streamline installation, allowing focus on the broader chassis and engine tuning work that separates competitive teams. This is purpose-designed hardware for drivers serious about exhaust system optimization within the modified racing class.