If a 2.0l 16v XE were producing 230bhp on Bodies, with 4>1 aftermarket manifold and decent stainless system, how much should I expect the performance to suffer if a Cat. Converter were introduced into the equation?
Basically, I'm thinking of moving the lump from a Nova to a Corsa B or C..
Of course the latter two require a Cat by law, and I really don't wanna give the plod/MOT man anything to fry me for, if it came to it!
So.. yuor thoughts guys?