Header Stock Car USRA

The SCHOENFELD Header Stock Car USRA (Model 1485-22) is a purpose-built exhaust header system designed for small block Chevy engines competing in USRA stock car racing. This pair of headers features 1.625-inch primary tubes that flow into a consolidated 3-inch collector, engineered to optimize exhaust scavenging and power delivery across the RPM range typical of circle-track competition. The steel construction with factory paint finish provides corrosion resistance suitable for both road and clay track environments.

USRA stock car rules restrict header modifications to approved designs, and SCHOENFELD's engineering focuses on maximizing flow efficiency within those regulatory boundaries. The 1.625-inch primary diameter is sized to balance low-end torque response with mid-range power without violating class specifications. The 3-inch collector diameter consolidates exhaust pulses efficiently while maintaining the compact packaging required in tight engine bays. At 24 lbs per pair, the headers add minimal weight penalty compared to cast-iron stock manifolds, a critical consideration in racing where every pound affects acceleration and handling balance.

This header system is built for drivers who compete under USRA regulations and require a direct bolt-on upgrade that passes technical inspection. Stock car competitors frequently choose SCHOENFELD headers to gain measurable horsepower gains—typically 15–25 hp depending on engine combination—while staying within class rules. The painted steel construction requires heat shielding and periodic inspection in high-temperature applications, standard maintenance for circle-track racers who demand reliable performance week after week.

USRA stock car racing demands headers that combine proven flow characteristics with regulatory compliance. These SCHOENFELD headers deliver both, making them a common sight in pits across regional and national USRA series. Whether running asphalt late models or street stock classes, competitors trust this design to convert engine displacement into measurable track performance.