Precision manufactured by the pioneer in exhaust performance, BORLA ProXS mufflers feature proven high-powered technology that is surprisingly affordable. Made of rust-free high quality, austenitic stainless steel, BORLA ProXS mufflers deliver more power, improved fuel economy, prolonged engine life, and a street-commanding growl that screams performance – all backed by a Million Mile Warranty. Applications are available for virtually all import and domestic cars and trucks. For more information, contact your local professional muffler installer, or use our Dealer Locater to find the one near you. Part # (A) Inlet Diameter (B) Outlet Diameter (C) Shell Length (D) Shell Height (E) Shell Width   40348 2 1/2" DUAL 2 1/2" 19" 4" 9 1/2"   40349 3" DUAL 2 1/2" 19" 4" 9 1/2"