Schoenfeld Insert Muffler - 3.5" Core Fits 4" Collector Helmet Visor Anti-Fog Insert Uses the Factory Mounting Holes

Uses the Factory Mounting Holes - for Easy Installation

1977-1978 GMC C35

Four 2-1/16 in

Features:Stock GM HEI replacement distributor cap

CS-5P-12 Cords sold separately

Schoenfeld Insert Muffler - 3.5" Core Fits 4" Collector Helmet Visor Anti-Fog Insert Uses the Factory Mounting HolesWith its straight through design, the Schoenfeld Insert Muffler will reduce the noise level without excess back pressure. The insertis light weight with nothing to burn out. 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,