I had impossible performance re-map STG1, with basically an induction kit and thats it, mine was done on comp then taken out on road where bits of fuel air etc were fiddled with, now i've had it a while im not overly impressed as my mates LC spools up so much quicker and we had same mods?? suppose thats the difference between RR re-maps and all comp stationary ones!
Wheni asked about STG 2 he said i'd need 3" DP and thats about it so i presume STG3 is FMIC, full stainless exhaust, increased TIP ETC!!
Hope your happy with it though!
p.s Bentaw there is a company thats started up called pipeworks the bloke who does used to design the blueframe and fabricate them, and at mo there no VAT registered so maybe give them a call, can get number if you need it they quoted me £775 for a full 3" system with 3" DP and 100 cell cat back race sounds good to me!