I'm trying to tune my Astra GSI and would like to know are FSE boost valve's good?
I would also like to chip my car, what sort of gain could I expect form a Superchip or Starchip? Which is better?
Cant afford a UNI-CHIP!
I currently have a 57i kit with a modded cold air system and a full Scorpion ex with a CAT replacement pipe.
Any other tuning info would be very helpful... the cheaper the better!!!