Insert Muffler 2.5inOD Fits 3in Collector

The SCHOENFELD Insert Muffler 2.5in OD Fits 3in Collector is a performance exhaust component engineered for street rod and custom vehicle applications. This muffler insert is designed to fit inside a 3-inch diameter collector, using a 2.5-inch OD core to optimize sound attenuation while maintaining exhaust flow efficiency. Constructed from steel with a natural finish, this 4-inch-long insert offers a cost-effective solution for builders looking to fine-tune exhaust tone without replacing the entire muffler assembly.

The core dimensions are precisely engineered to fit standard 3-inch exhaust collectors commonly found in high-performance applications. At 2.5 inches in outer diameter, the insert works as a secondary baffle element that breaks up turbulent exhaust pulses and reduces resonant frequencies responsible for drone and harshness. The 4-inch length provides adequate internal surface area to absorb and dampen sound energy while maintaining backpressure within acceptable ranges for naturally aspirated and small-displacement turbo engines. Steel construction ensures durability in high-heat environments, and the natural finish resists corrosion when properly maintained or sealed.

This insert is ideal for street rod builders, hot rod enthusiasts, and custom exhaust fabricators who need a drop-in baffle solution to modify existing muffler tone. Common applications include small-block and big-block V8 builds, vintage truck restorations, and custom exhaust systems where a secondary acoustic element improves overall sound character without major fabrication. The compact 0.37 lb weight adds minimal mass to the exhaust system. Proper installation requires access to the collector inlet and may require cutting or modification of existing muffler internals depending on the host assembly.