Hello, I've had my Astra remapped again today on the RR and it's currently at 138bhp and all i've done is de restricted the air box and put a K&N panel filter in there but I'm wanting some more power and a bit more noise. I have no idea where to start with an exhaust system and literally know nothing about them, the only thing I know is that replacing the back box will do nothing to improve performance. Does anyone have any tips or advice regarding the exhaust? where to get one? what do I...
Exhaust System on a 1.7cdti
Exhaust System on a 1.7cdti