Well had the m5 golf gti 5 weeks, and getting revo map tomorrow, have given the car a good service, oil change, new spark plugs and air filter, changed coolant flange due to slight water leak, done coolant change and changed Dv to updated model,
What bhp gains should I expect, hoping for 40bhp gain, even though revo quote 55bhp they offer a before and after rolling road run, £25 a run, would you think this is a fair price considering the map is £499 + VAT, thanks in advance