Milltek Sport Axle-Back exhaust systems are designed as a complete replacement for factory components, delivering improved acoustic performance and a more aggressive appearance. Available in a range of configurations, they allow vehicle owners to choose their desired exhaust volume and tone — from subtle enhancement to a distinctly sporty sound. Each system is made from aerospace-grade 304L stainless steel, ensuring exceptional durability and resistance to wear and environmental factors. Specifications - Pipe diameter (inches): 3.15 - Tips: GT-115 Blue Titanium - Feature 1: Needs x 2 F5168 adaptors if being fit to existing secondary catalysts bypass