Audi A4 2.0 B8 (Tiptronic)/Audi A5 (Multitronic) S line - Cat-Back Exhaust System with Dual-outlet Cerakote Black Trims Model_220i (G42) Coupe (21>) The M4 development has been

The M4 development has been based around a valved turbo back exhaust with the addition of a primary de-cat (catalyst bypass) exhaust upgrade

enabling continued use of the M4 drive modes to adjust the dynamic of the exhaust

AEMnet allows additional X-Series Wideband Controllers to be daisy chained together (up to 16 cylinders) for recording AFR in multiple cylinders

advanced manufacturing techniques and superior TIG welding procedures produce a superlative finish

Audi A4 2.0 B8 (Tiptronic)/Audi A5 (Multitronic) S line - Cat-Back Exhaust System with Dual-outlet Cerakote Black Trims Model_220i (G42) Coupe (21>) The M4 development has beenOur 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