2.5" downpipe+3" high-flo cat+3" cat back, any problems?

[Race94]

Will this set-up give me any problems?

 

[Sotarts]

It'll give you a nice top-end.
the only problem you might run into: how to adapt 2.5" downpipe to 3" cat.

 

[AiR]

why dont you go with a 3 inch downpipe too? you might as well do it now then spend more later when you want to go 3 inch.

 

[bubbaGSX]

u might get boost creep, because i did. n1 dp + n1 exhaust + b16g = boost creep for me

 

[lowridin2g]

most likely youl get huge boost creep after like 4400 rpms or so. i guess a way to avoid that much creep is to port the exhaust mani or have it ported.

o yea i know a guy who had the n1 catback and n1 downpipe and he crept to 28 psi, threw a rod through his block. now he has a jdm 6 bolt and 16g. this was on the t25 too.

 

[Cirus_93TSI]

besides the fact that u cant bolt a 2.5" downpipe to a 3" cat, it wolnt be a problem
u need a custom downpipe that goes from 2.5" at one end to 3" at the other, thats whats on my car, it works well

 

[Sotarts]

Originally posted by lowridin2g
i guess a way to avoid that much creep is to port the exhaust mani or have it ported.

WTF. This is the 3rd time I'm seeing someone say this... wtf is wrong with you people???

 

[SpooledGSX]

Originally posted by lowridin2g
most likely youl get huge boost creep after like 4400 rpms or so. i guess a way to avoid that much creep is to port the exhaust mani or have it ported.

o yea i know a guy who had the n1 catback and n1 downpipe and he crept to 28 psi, threw a rod through his block. now he has a jdm 6 bolt and 16g. this was on the t25 too.

what the hell is wrong with you? porting the exhaust manifold wont help with boost creep very much, if anything you need a larger wastegate flapper....and that "guy" you know shouldnt have been pushing his car if he knew it was creeping and especially not to 28 lbs on a t25, thats double the stock boost, and im goin to make the (hopefully not false) assumption that he had a stock motor and fuel system....even better....