Schoenfeld IMCA Modified Headers - 1-3/4" Primary - 3-1/2" Collector - Steel - Black Paint - SB Chevy 13199903 Optimized street/strip calibration that works

Optimized street/strip calibration that works out-of-the-box

3 1/2" outlet Collector Reducers

High - Holley and Carter - Race Only

710 in Long

Proven Cross Drilled Designs To Optimize Thermal Efficiency

Schoenfeld IMCA Modified Headers - 1-3/4" Primary - 3-1/2" Collector - Steel - Black Paint - SB Chevy 13199903 Optimized street/strip calibration that worksProduct Description: Headers IMCA Modified 1. 75 in Primary 3. 5 in Collector Steel Black Paint Small Block Chevy Pair Started in 1974, Schoenfeld is known for custom fabricated headers for all forms of circle track racing. Schoenfeld Headers is the worlds largest manufacturer of circle track headers, but they specialize in a variety of high quality exhaust parts, including turn downs, extensions, tubing bends and elbows, race mufflers, insert