Audi RS5 B9 GPF Models - Non-Resonated Race Cat-Back Exhaust System (Loudest) with Polished Oval Trims Model_Mk4 GTI 1.8 Turbo (1J) (98-04) A reduction in friction of

A reduction in friction of up to 26% plus a reduction in wear compared to a standard engine oil

each jug is tough enough for repeated motorsport use while remaining easy to handle when full

000rpm test: 86

Sound - Engine at Idle: 72

Audi RS5 B9 GPF Models - Non-Resonated Race Cat-Back Exhaust System (Loudest) with Polished Oval Trims Model_Mk4 GTI 1.8 Turbo (1J) (98-04) A reduction in friction ofOur 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 Grade stainless steel. This quality material will ensure that your Cat Back system