Car Corvette Dynomax Super Turbo Muffler, 2 1/2 Inch, 1974-1982 | Muscle Cars & Classics Exhaust Silencer Large internal flow tubes improve exhaust flow and reduce backpressure Dynomax 17744 Super Turbo Aluminized Steel 3" In/Out Muffler | Autoplicity Exclusive patented flow director channels exhaust flow and eliminates turbulence Super Turbo™ Aluminized Steel Driver Side Oval Gray Exhaust Muffler - Part Number 17757 by DynoMax. Muffler Inlet Diameter: 2.5. Muffler Outlet Diameter: 2.5. Parts Dynomax Super Turbo performance mufflers exclusive, patented, flow director design channels exhaust flow, and eliminates turbulence. 17757 Dynomax Muffler Driver or Passenger Side for Chevy Oval Right Left | UK Fiberglass matting technology absorbs unwanted interior resonance but maintains a mellow tone , 1., 75-inch to 3-inch inlet / outlet configurations