Schoenfeld IMCA Modified Mid-Length Primary Design Headers - 1 5/8" Tube, 3" Collector - Standard Port Drive Flange Wideband O2 Compatible with ALL

Wideband O2 Compatible with ALL fuel types

924 and 939 dual valve springs

Step by step illustrated instructions are included

Thiswheel now has more accurate bead seats and a lower run-out

Schoenfeld IMCA Modified Mid-Length Primary Design Headers - 1 5/8" Tube, 3" Collector - Standard Port Drive Flange Wideband O2 Compatible with ALLIMCA 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