Universal Race Series Stainless Steel Oval Silver Exhaust Muffler (14152) by MagnaFlow. Acoustical Packing. Muffler Inlet Diameter: 4 . Muffler Outlet Diameter: 4 . Muffler Body Length: 6 . Muffler Overall Length: 12 . Muffler Sound: Moderate. Muffler Configuration: Center - Center. With racetracks enforcing stricter decibel level restrictions MagnaFlow is giving racers a true performance option that optimizes power while still keeping the decibel levels within racetrack guidelines. These mufflers are rugged enough to survive any kind of racing events. MagnaFlow s Race Specialty mufflers feature stainless steel bodies muffler caps and perforated cores. The straight through Wide Open Performance design give maximum power and torque while meeting all track decibel level requirements. The Specialty Race Mufflers are rugged enough to survive grueling races like the Baja 1000 Dakar Monster Jam or even X-Games. These mufflers are tough as nails and gives you the performance you need EO# D-193-137 This product ships in approximately 1 days