Milltek Sport exhausts are produced in high quality type-304 aircraft grade stainless steel. This material is anti-magnetic (other manufacturers' stainless steel may not be) and is less susceptible to discolouration. This quality of stainless steel is used on all pipework and the total construction of the silencer. Mandrel bending ensures full flow bends for better gas flow and Milltek systems are increased in bore to ensure ultimate performance without the loss of mid-range torque. A Milltek Catback Exhaust System replaces the rear half of your exhaust from the Catalytic converter back. This gives you the best of both worlds, improved sound and looks, but no worries about legality. Replacing stock pipework with wider, better designed Milltek pipework releases more performance from your cars engine. A new Milltek backbox and silencers will give your car a Sporty, but refined sound. Outstanding looks Sporty but refined sound Lightweight and durable stainless steel Outstanding fit and quality Milltek put a lot of work into engineering the sound of the exhaust. Anyone can make a car louder. Milltek carefully tune the silencers in the system to offer a Sporty, but refined sound. The exhaust is designed to sound fierce when you drive the car hard, but not to drone at idle or when cruising. C7 4.0 TFSI biturbo quatro inc Performance Edition