Ive heard from some1 that stainless systems can cause the rest of the system (i.e. the cat and manifold) to rust quicker. Is this obllocks? Also, is it worth payin an extra £100 for a stainless cat-back system over a mild steel system? What sort of power increases and other benefits will that give?
Oh, and another quickie...
Does drillin ur airbox do anythin for fuel economy? I seem to remember seein a post about a mod on a Veccy V6 that lowered the consumtion on idle, from 0.3 to 0.2 or somethin like that