My stock GTS manual I’ve now owned 9 years, 70k miles, 2 or 3 track days a year and it will be a lifetime keeper. It’s OPC serviced and under warranty but I’m now thinking of aftermarket remap/tuning/ exhaust. Having trawled the forum and other sites, there doesn’t seem to have been much activity in this area - I’m Bucks based and surrounded by great independent specialists like RPM, Autofarm and JZM who I will talk to but wondered if anybody on here had improved their GTS and what advice they might give? I appreciate power gains will be minimal but the objective is really just to fine tune on the engine side what I have done on the suspension side with Center Gravity.
