Just working my way through the performance mods and need some guidance with regards exhaust upgrades. I have bought a Milltek flexi pipe and a Toyosports manifold. I know everyone will say the manifold is no good (this may well be the case) but it was cheap... Obviously there is a difference in the build quality of the items. My question is should I go ahead and fit the parts that I have or should I bite the bullet and buy a Milltek manifold and sell off the items I have. I know the Milltek manifold will fit correctly and offer the best performance, but what other negatives might there be with fitting the the parts I have. If we are talking just a couple of BHP then it might be worth sticking with what I have??
Question 2, What sort of BHP gain is there in fitting a sports cat over the original cat? The branded ones are expensive, any other options? I want to run a cat not a de-cat system
Question 3, how restrictive is the rest of the original system? from what I've read the manifold / flexi are the biggest restrictions. I guess I'm looking at doing the impossible by trying to get max BHP without spending a fortune,........ All advice welcome. I have already fitted a K+N intake.
Thanks for your time, JB