Hello all, new to the forum, I have just bought a standard mk5 gti, colour coded bumpers in silver and tinted back windows, very nice. A couple of questions as im not the most mechanically minded, ive got about 1000 to spend, what can i do for that, can i replace a ko3 turbo straight on with a ko4, and will it make a difference, who does the best for remap in north lancashire, cheers all.