All, I am considering "chipping" my 1.9TDI Sport Quattro to improve the overtaking times (30 to 70 & 50-70) do not need to massively improve the top end (I can lose my licence at 100 just as easily as at 140!)because the mid range grunt which I had on my Passat TDI Sport and pop's Golf 2.0TDI is just not there,I know most of this is down to the extra weight of the quattro sysytem. I am looking at systems which modify the ECU via the OBD port, no replacement chips, exhaust, filters, so everything looks standard. Anyway does anybody have any real experience of this, concerns are warranty, insurance also increased stress on components, e.g. brakes are the same as the ones fitted to 2.5 TDI? the gearbox, does anybody know the torque capacity of the 6 speed gearbox, Superchips quote 330lb/ft, also can the clutch (never had a clutch replaced last 2 cars passat 90k miles ,vectra 120+k miles)and drive shafts cope. Also how undectable are they from the dealers, will they notice anything when the plug the car into the computer or just when the road test. Comments and experiences appreciated. Cheers George. p.s. Or is just a waste of time and money and next time just swap it for a 3.0 TDI!!!