For once im not wanting to know if a hatch exhaust fits an estate etc...
What I want to know is what factors effect power? Im talking cat back only, but does it matter on the size of the centre section? or the size of the back boxes?
I know you can get reducers etc but will this affect my power?
I have a cunning plan, but im not sure if im just going to end up losing power!
Cheers in advance