Audi B6 S4 4.2 V8 EVO Catback

Audi B6 S4 4.2 V8 EVO Catback

I am happy to announce the development of the EVOLUTION CATBCACK system for the B6 V8 S4.  The system is built in dual 63mm with 4 silencers and a X-pipe.  Sounds Brilliant….. power gains of 5 kw where seen on the dyno. P.O.A