I couldn't really find a straight forward answer what im looking for. I plan on getting a 3" downpipe on my 1jz. So, where can you buy a 3" dp that will fix in a Sc300 perfect? Exhaust: I was going to run 3" all the way but, how would 4" do? Think it would hurt low in power with 4"? If you have any links of a 3" downpipe tell me

 

i have a DP made for a 1j sc300....4" would be way to big, unless your running a big single turbo t88 or above

 

So you think 3" will be perfect?

 

yeah im running a t67 dbb(well right now it only the pt61) and i run 3" when i was stock twins i was 3" it sounds great too!!!

 

what brand is your downpipe? im looking at doing a 3inch manifold back on my 1jz