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.

[celica3sgte]

I bought the Apexi N1 muffler for $205 shipped. There will be a downpipe on the engine you import. I bought an aftermarket downpipe b/c it's incrediblely less restrictive. So once you get the engine, go get your custom exhaust bent, and later if you want to get the aftermarket downpipe, it will bolt on to your custom bent exhaust.