Milltek Sport exhaust systems are engineered for enthusiasts seeking performance, sound, and quality. Each Cat-Back system combines precision engineering and durable materials for a perfect fit and finish. All products are made from 304L Aircraft Grade stainless steel in the UK, ensuring exceptional strength and corrosion resistance. Designed to enhance both aesthetics and driving experience, Milltek exhausts deliver a refined yet powerful sound. Specifications - Pipe diameter (inches): 3.0 - Feature 1: Does not Require the OE System to be Cut - Feature 2: Requires Stage 2 ECU Software or OPF/GPF Bypass Module