EXCEPT ZR2 & AT4X models. Factory Split Rear Exit Vehicles ONLY. This system features Black Chrome on T-304 stainless steel tips. Using BORLA® Stainless Steel Polish p#21461 is NOT recommended with these black chrome tips. We suggest cleaning the tips with hot water and a microfiber cloth.This Cat-Back™ system by BORLA® features a "True Dual" design which is unique in the industry. Installation requires cutting the the factory Y-Pipe. The system has the famous BORLA® "S-Type" sound level. The muffler contains and internal H-pipe for increased performance and improved sound. It is built with premium, high-quality austenitic T-304 stainless steel using computer numerical control (CNC) manufacturing techniques that ensures accurate fit and maximum performance. All this without the annoying drone often associated with performance exhaust systems.