Custom Exhaust, how big? Options

[Chrobis]

Well I am probably getting custom exhaust this week and need to know what size pipe to go with... I will be swapping in a 3s-gte pretty soon and need to know the best pipe for that aplication, i really dont care if it cuts performance on my 5s-fe for the time being. I was thinking 3" pipe, high flow cat, and the hks muffler. I just need to know if 3" is to big for the 3s-gte and how bad it will cut performance on my 5s.

[97sccelica]

first off, it will become a huge pain in the ass if you fail smog.

what i say you do, is go to a small independant smog tester and talk to the guy.

i have a friend that owns his own shop with one of the new smog testing machines. my dad and him are both from the same country and they always talk.

no matter what i do to my car, he will pass the car for me. he has a honda civic DX sitting about 25ft from the tester, he will run that car and enter mine into the computer.

BTW, i think a new law was passed that says a cop can use his own judgement on whether an exhaust system is too loud.

and if he takes a peek under your car and sees no cat, YOU ARE SCREWED.

taking off the cats will help power wise, but high flow cats are almost as good as test pipes, and a lot quiter.

it depends on how loud you want your car and if you have a friend that will pass the car for you.

if you cant get some one to pass the car, go retake the emissions test, so that you will have 2 yrs till the next test.