9in Muffler 3.5in In/Out

The Schoenfeld 9in Muffler 3.5in In/Out is a compact exhaust muffler designed for high-performance automotive applications where space constraints and thermal management are critical. This steel muffler delivers effective sound attenuation while maintaining a tight installation envelope—ideal for custom engine builds, race vehicles, and engine swap projects where traditional muffler dimensions won't fit.

The muffler measures 9 inches long with a 4.375-inch diameter body, accepting 3.5-inch center inlet and outlet connections. This symmetric flow design minimizes backpressure while the compact length accommodates tight underbody clearances. Black paint finish provides corrosion resistance and a finished appearance. At 2.43 lbs, the unit is lightweight enough for street and track use without adding significant mass to the exhaust system. The steel construction withstands high-temperature cycling common in performance driving and off-road use.

This muffler suits builders working with limited exhaust space, including mid-engine conversions, vintage car restorations, and compact engine installations. The 3.5-inch inlet and outlet sizing accommodates standard performance exhaust manifold and tailpipe applications. Schoenfeld is recognized in motorsports circles for manufacturing quality competition exhaust components, and this muffler represents a practical solution for applications where standard aftermarket sizes prove incompatible with the vehicle's geometry or installation constraints.