Borla Performance Industries is proud to launch the XR-1® Diesel Line with the release of our Cat-Back™ Systems and Turbo Downpipes for Chevrolet Duramax 2500/3500 Turbo Diesel Powered Trucks 2003-2006. Over the years, the lessons learned in professional racing have transferred to the intense durability requirements of heavy duty diesel powered pick up trucks. BORLA has incorporated our patented XR-1® multi-core muffler design into these large 4” diameter mandrel bent free flowing exhaust systems.

The Duramax lineup includes: part #140097 (CC SB) or #16765 including downpipe; #140116 (CC LB) or #16762 including downpipe; #140117 (EC SB) or #16673 including downpipe; and #140118 (EC LB) or #16764 including downpipe. All systems must be used in conjunction with the factory catalytic converter or BORLA downpipe for proper installation. BORLA downpipes (#60079) are designed exclusively for farm, line-inspection, off-highway and competition vehicles where the use of a catalytic converter is a fire hazard and are prohibited from being used on vehicles driven on public or publicly funded roads.

The Chevrolet V8 Duramax turbo diesel engine equipped with automatic or manual transmission will see noticeable performance improvements. Each BORLA exhaust component is engineered for maximum performance output with any aftermarket performance upgrade to the induction and ECU. Each 4” system has a massive 5” diameter 14” length round, rolled edge, angle cut stainless steel polished tip at the side exit. They each feature a 6-3/4” diameter, 19” long round Borla Patented Multi-Core XR-1® Muffler incorporating BORLA’s patented technology made famous on racetracks around the world as the winningest exhaust in racing. The Multi-Core design maximizes flow, lowers exhaust gas temperature for engine durability while providing optimum, pleasing sound levels. Mandrel bent, Aerospace grade high quality austenitic stainless steel designed for direct bolt-on to the BORLA downpipe or the factory catalytic converter. Genuine BORLA exhaust — now for diesels — delivers its 28-year tradition of quality, performance, ease of installation and the legendary BORLA sound of power. In fact, this dynamic new XR-1® Diesel system has been noted for creating deep throaty growl resembling a big-block gasoline engine of years gone by. All this and guaranteed for a cool million miles.