Schoenfeld IMCA Modified Mid-Length Primary Design Headers - 1 5/8" Tube, 3" Collector - Standard Port Drive Flange 924 and 939 dual valve

924 and 939 dual valve springs

Single-layer pants offer the maximum combination of overall flame and heat protection

Designed specifically for Edelbrock manifolds

Wideband O2 Compatible with ALL fuel types

10-32 RH cable ends and 3" of travel

Schoenfeld IMCA Modified Mid-Length Primary Design Headers - 1 5/8" Tube, 3" Collector - Standard Port Drive Flange 924 and 939 dual valveIMCA Modified Mid length Primary Design Headers offer a compromise between low end torque and high RPM horsepower. Fits Bob Pierce, BMS, Dirtworks, GRT, Harris, Hoffman, Jet, Larry Shaw chassis. 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