because of my lower compression ratio i still would have back pressure ploblems mate yeah. supersprint are another company that want nearly 2 grand for an exhaust system i could justify that.
I'm going to heat wrap the exhaust in carbon tape from manifold back to see if it makes a difference on the RR after the charger is fitted. ive gone for KTR's pro exhaust as its good value for money and after a quick search on youtube sounds pretty meen.