Flowmaster 8525554 - 50 Series HD Chambered Muffler

50 H.D. Muffler 409S - 2.50 Dual In / 2.50 Dual Out - Moderate Sound 50 series HD, three chamber mufflers. Designed primarily for today's heavy duty gas and diesel trucks, this muffler will deliver improved performance, throttle response and mileage. Featuring a deeper, moderate tone with minimal resonance, it is ideal for trucks with modified engines. Constructed of 16 gauge 409S stainless steel material and fully MIG welded for maximum durability.