The 140807 Cat-Back(tm) system is specifically designed to fit the Mustang GT convertible that is NOT equipped with Active Valve Performance Exhaust. System contains a merge X-Pipe for increased performance and improved sound. It features the distinctive S-Type sound level without drone or resonance inside the vehicle. Four 4" bright chrome on T-304 stainless steel tips provide a stylish appearance. CNC manufacturing ensures proper fit and increased performance. High-quality T-304 stainless steel ensures durability. Best of all, Borla(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.