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.

[sphinx]

that's just up to you. It depends on how soon your going to do the swap. if it's gonna be real soon, might as well just eliminate it now. if not, then get a hi-flow cat for a while until you do the swap.

now, for the cat's, that's really up to you. You don't have to eliminate them, but you can. The reason I did was because i'm trying to get the most power out of my motor as possible. And your right. The motor is NOT smog legal, so it realy does'nt matter if you take the cat's off, cause if you get caught, your ****** either way.