Borla XR-1 Sportsman Racing Muffler 4in In/4in Out Muffler 2011-infiniti-qx56-esi6042083 and a 40-percent increase in

and a 40-percent increase in external fin surface area

Ultimate thermal barrier reduces turbo lag

2003-2005 Ford E-150 5

high-rpm use at championship-level racing

Borla XR-1 Sportsman Racing Muffler 4in In/4in Out Muffler 2011-infiniti-qx56-esi6042083 and a 40-percent increase inHigh quality austenitic stainless steel. Patented, race winning XR 1 Raceline technology. 3 options: Offset Made with the same patented, flow through design as the XR 1 Sportsman oval. The inlet outlet are offset to the same side of the muffler, to accommodate transmission and frame rail interference on some applications Oval BORLAs #1 selling racing muffler. Satisfies the needs of most racing applications because it is the lightest, most compact, and