The COBB Tuning Stainless Steel 3Ó Turbo Back Exhaust was designed to be everything we were looking for in an exhaust system -- a complete, truly engineered system, that offers optimal performance, tasteful looks, and unparalleled durability without a loud and obnoxious exhaust note. The system is offered with a high flow catalytic converter. This is a direct fit replacement to the stock exhaust unit.