BORLA EXHAUST 40670 MUFFLER PRO XS 3IN IN 2X2 1 4 OUT 19X9 1 2X4 W O Borla Universal Pro XS Muffler Oval 3in Inlet Outlet Offset Offset Notched Muffler Borla 40364 Universal ProXS Muffler 2.5" Center Center 19" Stainless Borla Tundra Sportsman Un Notched Oval Muffler; 3.50 Inch Inlet 3.50. Value priced BORLA ProXS mufflers share many of the hottest features of our performanceline. Including high quality 300 Series austenitic stainless steel construction, streetcommandingsound and our Million Mile Warranty. Sizes are available for import anddomestic cars and trucks.