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Downpipe question

Posted: Tue Feb 23, 2010 3:25 am
by Redlined
ok... after a 6 month Work binge I have money flowing out my ears and want to spend some of it on Angel.... or.... have spent some of it on Angel... but thats not the point.

I have a 06 STI cat-back exhaust system. with x " extension so it will fit my car. as I continue to up the anti Im thinking I need to bring the Downpipe up to spec. so the question is what should I do for a down pipe. YES I KNOW the STI exhaust is only 2.5" not 3" and you can bite me. I dont plan to upgrade from that. I like having a car that I can bury the gas pedal and not alert every five-0 for three blocks.

So... is there an appropriate year STI down pipe that matches ours? (since my 06 exhaust was lengthened to match my stock Downpipe)

Should I go After-market?

Should I get an 06 DP? and maybe have my exhaust adjusted to fit it?

Whats my best choice?

as always, Thanks in advance!

Posted: Tue Feb 23, 2010 4:37 am
by Josh222
I wouldn't bother replacing the stock downpipe for another factory downpipe off a STI. They are both crappy flow wise just being a flat plate with a small hole in it. You want a nice bellmouth our divorced downpipe.

Posted: Tue Feb 23, 2010 7:45 am
by Mattheww044
I would just get an apftermarket DP, if you dont want it to be loud you can get a catted one, but since your not running full 3" TBE it shouldnt be too loud.

(please note I am sure our opinions on loud are way different, I have 3" bellmouth DP, 1 resonator, 1 gutted dual tip muffler, and the rest is all 3" pipe. Suprisingly, it sounds really good and isnt "too loud". I actually want a little louder but that's nothing I am too concerned about ATM)

Posted: Tue Feb 23, 2010 8:18 pm
by Redlined
No worries. Pretty sure just changing the dp won't change the volume much. Was mostly defending my reason for staying with the sti exhaust.