is replacing the stock cat converter with a straight pipe gonna increase any HP.... and is there any noise difference and is it a good noise or annoying..

 

There is no difference in noise.

 

any difference is HP?

 

I'm sure there is a few extra but it's not enough to notice.

 

so in other words ... i shouldnt waist my money on it

 

That's because of the resonator. But a gutted cat will work .

 

Unless your boosted don't wate your $ on it. There are a lot better mods to waste it on.

 

I believe it's also illegal as hell..i mean, alot of things are illegal. At least it is in Illinois its illegal to bypass the cat ($10000 fine or some other high number), so taht makes me pretty sure that it's even worse to just rid of the cat...so, not worth the chance for a horse or two.

 

we cant change our cats periode as long as they are functioning well..
and how bout that supercharger i'm sure thats not legall either but you have it =)