UDTRA 11in Long Muffler

The UDTRA 11in Long Muffler by SCHOENFELD is engineered for builders and enthusiasts seeking serious exhaust flow optimization on high-performance vehicles. This 11-inch muffler addresses the critical demand for unrestricted exhaust scavenging in custom engine builds where stock silencers create backpressure losses and thermal inefficiency. Whether you're tuning a street rod, race car, or modified small block, this muffler is designed to work in systems where maximum exit velocity and minimal restriction take priority over OEM-style sound attenuation.

Constructed with performance-grade materials and aggressive internal flow routing, the UDTRA muffler reduces backpressure across the entire RPM range—a critical factor in extracting peak horsepower from modified or high-displacement engines. The extended 11-inch length provides additional expansion chamber volume, allowing exhaust gases to exit with minimal velocity loss while managing sound levels through strategic baffle design rather than restrictive packing. At just 3.15 lbs and compact 4.35-inch diameter, this muffler integrates seamlessly into tight custom exhaust systems without sacrificing structural integrity or requiring excessive tubing rework.

This muffler is ideal for fabricators, engine builders, and DIY mechanics assembling full-custom exhaust systems from mandrel-bent tubing. It pairs well with headers, high-flow catalytic converters, and velocity stacks in carbureted or fuel-injected applications where header scavenging and low-restriction exhaust flow directly translate to measurable power gains. Installation requires standard muffler clamps and hangers; verify inlet/outlet diameter and pipe configuration before ordering to ensure compatibility with your existing system.