Hi, iv just bought a mk4 2.0 gti running individual bodies. Its running lumpy and isnt smooth until jitting high revs. Been told it needs mapping to set them up correctly. Was wondering weres the best place localy (mansfield nottighamshire)? Also what sort of price am i looking at and what gains can be expect? Is it a comon mod and is there anyone on here with experience with a similar set-up? Thanks