Milltek Sport | Cat-Back (Smaller Rear Silencer) (VW Golf MK5 GTI)Milltek Sport Cat Back (Smaller Rear Silencer) (VW Golf MK5 GTI) 2005 2009 Miltek Sports range of Cat Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and or add a more suitably aggressive tone. All our products are made from 304L Aircraft