BMW F20/F21 M135i (Non X-Drive) - Cat-Back Exhaust System with Race Rear Silencer & Ceramic Black Tips Audi > A4 > 1.8T B6 quattro Saloon - Avant 190BHP (6 speed) > 2003 to 2005 The tonal changes are felt

The tonal changes are felt throughout all rev ranges under load

Black silicone intake pipe

6mm) inverted slash cut tailpipes in either a highly polished stainless steel or Cobra Sport 'Blackout' black ceramic coated finish

Manifold Pressure

BMW F20/F21 M135i (Non X-Drive) - Cat-Back Exhaust System with Race Rear Silencer & Ceramic Black Tips Audi > A4 > 1.8T B6 quattro Saloon - Avant 190BHP (6 speed) > 2003 to 2005 The tonal changes are feltOur 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