I have a full 3" system on and I am going 2 fit the manifold 2 suit but I dont know if it would b worth while 2 fit a new up-pipe also as I have a 04 STI and there is no Pre-cat in the up-pipe.

wat do u guys reckon should I go the whole hog r keep the oem up-pipe?

 

Well im fitting the up-pipe when im fitting my headers to my 99 rb5, so i would think itd be a better job doing both at the same time, any original stuff is usually restrictive in some way

 

FIT THE UP PIPE