I have a Mk3 Astra 1.4i 8v (C14SE engine) with an auto gearbox. I have "modified" the airbox, but I am thinking of getting a stainless steel cat-back exhaust and stainless steel 4:2:1 manifold.
How responsive do you think my car would be if I fitted this stuff to it? Would torque ranges etc. stay the same, or would I get more torque say in higher RPM etc (ie. would torque ranges be shifted)?
I saw on the PVD web site that they do a Lexmaul exhaust and manifold for my car/engine, has anyone used their exhausts before? Are there any other exhausts I could use ie. Magnex/Scorpion and such like?