Borla 04-07 STi XR-1 Cat-Back Exhaust
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BORLA® Performance once again leads the industry with a high flow performance exhaust for the hot Subaru WRX and WRX STI. This Cat-Back™ system, BORLA® #140075, is custom designed by BORLA® engineers for the 2.5L turbocharged 4-cylinder engine with automatic and manual transmissions.
Winning on racetracks around the world has given BORLA® a leg up on the competition with trickle down technology from the world ‘s fastest cars. The unique design is a direct bolt-on fit that meets all emission requirements. The system has shown significant flow and performance improvements by virtue of BORLA® XR-1® patented technology utilizing 3" tubing that exits with a super looking BORLA® logo embossed 4"angle cut, rolled edge, single round polished T-304 stainless steel tip. More flow means more power, and if you tune this turbocharged super import, that flow will simply allow even more power. When you get a close look inside this muffler, you can see the patented BORLA® XR-1® multi cores -- that look says total performance. Increased fuel mileage is an added benefit. And, one more thing, it has a great sound, too, but then you‘ve come to expect that from BORLA®. Add a BORLA® header (#17217) for even more performance.
BORLA® Performance Industries, the original pioneers of high quality T-304 austenitic stainless steel (superior to T-409 or aluminized steel) free flow exhaust utilizes its patented award and race winning technology to deliver quality, sound, performance gains and enhanced fuel economy – all with an easy bolt-on installation. All BORLA® street products carry the famous BORLA®' written million-mile warranty.
| PIPE DIAMETER | TIP SIZE | EXIT |
| 3" | 4.5" | Single Left Rear Exit |
