Audi S1 - Non-Resonated (Louder) Cat-Back Exhaust System with Quad Cerakote Black Round Trims Model_A 45 S (2019>) the Oil Return goes into

the Oil Return goes into the ENGINE BLOCK so you do not need any additional parts to fit this to a TDI

The new systems for the M135i are based around a cat back configuration with the option for either a resonated or louder non resonated centre section

For best results

For those looking to take the style upgrade a stage further

a Twin-Tangential Velocity Stack

Audi S1 - Non-Resonated (Louder) Cat-Back Exhaust System with Quad Cerakote Black Round Trims Model_A 45 S (2019>) the Oil Return goes intoOur 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