ECE approved systems are those that comply with Economic Commission for Europe (according to ECE-R59) rules for motor vehicles vehicle systems and components. EXCEPT convertible. System has Active Valve Exhaust valves. Resonator contains a H-Pipe for increased performance and improved sound. Borla(r) Cat-Back(tm) & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power driving excitement fuel economy and the distinctive Borla(r) Sound of Power respected by motoring enthusiasts everywhere. This system comes with carbon fiber tips with bright centers.