Ford has raised the performance bar with the 1999-04 Supercharged 390-horsepower Mustang Cobra. And Borla Performance Industries, chosen by Ford SVT as the factory exhaust on the last Mustang Cobra R, has updated it further with a high tech, custom tuned exhaust featuring bright chrome on T-304 stainless steel tips. Borla Engineers massaged and balanced the complete system based on the Ford ECU Strategy that allows the engine to breath free without interrupting the careful balance of on-board engine management. The Cat-Back system (PN 140052) is full dual with 2.5" aerospace grade high-quality T-304 austenitic stainless steel mandrel bends and generates a straight-through performance based exhaust flow that not only brings the best out of the Cobra Mustang but also gives that extra capacity for additional aftermarket performance upgrades down the road. Make no mistake, this is an aggressive system and proclaims pure power. We also offer a more Borla traditional system based on the Cobra R system (PN 14858) that is less aggressive but with identical performance gains. 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.