I've got a 2008 Audi A5 3.0 TDI, I had a stage 1 ECU remap put on a few months back which saw amazing results of 309.7bhp with 510.9 ft/t. After getting used to the power I'm looking for more and appreciate your advice.
For stage 2-3 I'm guessing I need :
1. Cat-back exhaust - best...