Thrush Welded Muffler

The DYNOMAX Thrush Welded Muffler (part number 17637) is a universal-fit exhaust silencer designed for vehicles requiring a 2.25-inch offset inlet and outlet configuration. Built from aluminized steel, this welded muffler delivers sound reduction while maintaining flow characteristics across a wide range of engine platforms and displacement classes. The 23-inch length and oval body design accommodate diverse underbody routing requirements common in street, sport, and light-duty truck applications.

The muffler's aluminized steel construction provides corrosion resistance in environments with typical road salt exposure, though aluminized finishes require periodic inspection in severe marine or industrial conditions. The welded chamber design creates a pressure-balanced acoustic cavity that attenuates exhaust noise across multiple frequency ranges. The 17 x 4 x 9.5-inch oval chamber and 6-inch depth optimize internal volume while fitting tight underbody spaces. At 12.75 pounds, the unit represents a lightweight solution compared to larger chambered designs, making it suitable for weight-conscious builds or vehicles with marginal suspension capacity. The 2.25-inch offset inlet and outlet allow direct slip-fit connection to complementary exhaust piping without adapter requirements.

This muffler serves builders and owners performing custom or replacement exhaust work on universal platforms where OEM equipment is unavailable, damaged, or acoustically undesirable. The welded construction eliminates perf-tube maintenance concerns inherent in some perforated designs. Its compact footprint and universal mounting bosses make it a practical choice for vintage restorations, engine swaps, and street rod projects where standardized exhaust systems do not exist or fit. The aluminized finish balances cost and durability for general street use.