plus 4s proven to be bad? who proved it? maybe on forced induction car? deleting all those nasty bends AND the cat with a bandrel bent y wont help?? because the intake wont suck enough in? i thought the intakes and maf were ok until you start really making power. an engine is an air pump basically. right now the bottle neck of my air pump is the cat-back. get rid of that bottle neck and the air pump can pump more get it? if anything i might lose a little low end torque by opening up the exhaust.
