Header SBC Modified 1-5/8in Rage Long

The Schoenfeld Header SBC Modified 1-5/8in Rage Long (Part Number 1131) is a purpose-built exhaust header designed for IMCA and UMP Modified racing applications. This pair delivers optimized scavenging and flow characteristics through a 1.625-inch primary tube diameter that feeds into a 3-inch collector, engineered specifically for small-block Chevy engines operating in the modified class. Cast in steel and finished in durable black paint, these headers represent the proven design standard for entry-level Modified competition.

The 1-5/8-inch primary sizing strikes the critical balance that Modified rules require—large enough to support adequate exhaust velocity and reduce backpressure across the RPM band, yet sized within class regulations for fair competition. The long-tube configuration maximizes the runner length for improved scavenging efficiency in the mid-to-upper RPM range where Modified engines typically operate. Each pair comes complete with gaskets and mounting hardware, eliminating the need for separate sourcing. The consistent black paint coating provides basic corrosion resistance across multiple race seasons.

These headers are the choice for Modified racers who need reliable, regulation-compliant exhaust flow without premium pricing. They fit small-block Chevy platforms in cars running IMCA and UMP Modified classes. Weighing 28.9 pounds per pair, installation is straightforward for experienced builders. The Schoenfeld name carries established credibility in Modified racing circles, where this header design remains the baseline for competitive exhaust systems.

For racers stepping into Modified competition or rebuilding a race car, the Rage Long header offers the specification compliance and performance consistency needed to focus on other chassis development priorities.