im new to this forum site so firstly, hi all! This is just a brief query. I am the proud owner of a mk4 gti 150bhp pd diesel. I have had the car for around a year and a half now and as the warranty is now approaching its end (its an import, hence not 3 years) i am thinking about having it chipped. I have done alot of surfing around and there seems to be two styles of chip available, 1 for around ?40 and the other for around ?300. Whats the difference? Is the cheaper option to be avoided? Does it work like the cheap car chips and basically make the engine run rich, hence causeing increased bore wash? Any advise would be appreciated.