All, I am in the market for a VR6. I currently have a 97® Golf GTI 2.0 8v, engine code AGG. With this engine code, performance mods are very difficult. TSR and other performance centers have said it is something with the fuel management. Shrug..?.? I am seeking any information on engine codes for VR6's that I should avoid or seek out with regards to positives and/or negatives. ?!