I had the exhaust bypass done a couple of weeks ago. Quite a bit louder at cold start but then quieten downs as the car comes off it’s cold start setting. When pressing on it has a really nice raspy growl and the pops are a lot louder too. Settle down into a steady cruise and it’s silent as stock system is.
Dreamscience Ultima Map, RamAir induction kit, Turbosmart Shortie BPV, Mountune SSC, Exhaust Bypass mod, Rally Armour Mudflaps