Muffler IMCA Spec 3.0 Inlet 9in Long

The Muffler IMCA Spec 3.0 Inlet 9in Long by SCHOENFELD is purpose-built for sanctioned circle-track racing, street stock competition, and entry-level dirt oval programs where IMCA regulations govern engine and exhaust architecture. This compact muffler delivers the noise suppression required to meet track decibel limits while maintaining the scavenging efficiency that naturally-aspirated engines demand during sustained high-RPM runs. Whether you're campaigning a hobby stock, modified, or IMCA late model, this muffler bridges the gap between street legality and competition performance without sacrificing reliability or durability.

Engineered to IMCA specifications, the 3.0-inlet design accepts standard 3-inch primary pipe and optimizes flow velocity to reduce backpressure while managing exhaust velocity for consistent scavenging across the RPM band. The 9-inch length fits tight engine bays common to frame-notched race cars without requiring complex chassis or exhaust routing modifications. Weighing only 2.04 lbs, this lightweight construction minimizes unsprung mass and reduces thermal load on surrounding components—critical factors in competition environments where every ounce and every degree Fahrenheit counts. The compact 3.55 x 3.5 footprint permits clearance in confined spaces where full-size street mufflers cannot fit without welding or rework.

Competitors running IMCA divisions, ASA, or grassroots circle-track series will find this muffler the ideal bolt-on solution for engines already equipped with a 3-inch collector or primary bundle. Installation is straightforward: slide the 3.0-inlet opening over your primary pipe, clamp or weld to suit your exhaust design, and route to frame or bumper exit. Mechanics and fabricators favor SCHOENFELD exhausts for their consistent flow characteristics and track-proven durability—expect this muffler to survive multiple seasons of weekly racing without internal collapse, corrosion perforation, or acoustic degradation.