03boostedwrx

I went to install my exhaust today, and ran into some crazy problems lol. I put in the BPM downpipe, then tried putting in an HKS carbon fiber cat back kit. Well, the downpipe and cat back exhaust did not fit. there was a 6 inch difference between the mid pipe and downpipe. anyone run into this problem? I sent back the BPM downpipe, and ordered the HKS downpipe. I am guessing the BPM is designed to be used with their own exhaust system. I wasn't very happy today lol.

Also I am putting in the O2 eliminator kit, has anyone put this one in yet? the wiring digram in the instructions suck and make no sense. any help would be appreciated.

banpreso

hahaha, u need to do more reserch b4 u do ur mods
the U.S. spec wrx has 3 cats, and the jdm sti only has 2. so the size of the down pipe and middle pipe of the U.S. verson is different from the ddm ones, so u kindda have to get the jdm front, middle and rear pipe, and that would get rid of the extra cat. but ofcourse this would not allow u to pass somg, so u better skeep ur stock pipe

03boostedwrx

I had the BPM Downpipe, but apparently that is only to be used with their exhaust system. I used the whole HKS turbo back system, and it fit perfectly, and sounds great. also I feel a huge difference in performance.

banpreso

hey i have my own prob, i just got a zero sports down pipe, the stock jdm sti middle pipe, and sti genome rear pipe. would everything fit well? or the fittings would be different from the stock ones? did u go to a muffler shop to do urs?

03boostedwrx

No I do all my own work. I don't know if those pieces fit. I used the HKS down pipe and the HKS exhaust, it fit perfectly and sounds great and I noticed a huge difference in performance.