Exhaust/Cat-back
 

i have two questions about a cat-back system i'm thinking about buying.

1. will i be able to bolt on a 3in exhaust on the stock catalytic converter? (or should i just get a straight pipe?)
2. do japanese ma70/1jz have the same exhaust layout/size/bolts as the american supra's

i'm bringing back one from japan (cheap and uniqe) but id like to make sure it fits first. lol