i have a hi spec monster 4 brake converstion on my new car and it needs new discs as they are cracking need to no best place for them and also are turbo systems good as my car has had alot of work done by them and i have been ringing them to find out some information on the chip but cant get through to them it running closed loop l8 greys low compression 7:5:1 big turbo but running 7.9 % on gas analiser put £120 of fuel in it to 300 miles