Slo_crx1

As long as the STi pipe has no cats and is a decent size then I'd say go for it. I have a solid thick walled Agency Power piece on mine, the only bitch was having to loosen all the turbo mounts to get all the gaskets to seal properly. I also have to unbolt the motor mounts and jack the motor up a hair for extra clearance, but it was well worth the extra flow compared to that stock 1.5" pipe lol.

Smith-02

got my cel this morning coming to work. went to vatozone for lunch, got 2 sparkplug anti foulers. drilled one out to 13mm, threaded the o2 into it, threaded the assy into a un-drilled anti fouler, threaded the ---- into the o2 bung, plugged in the select monitor, cleared my codes, found out that i can adjust things via the selectmonitor, but didnt cause i wasn't sure how it was gonna work. no cel, ill find out in a day or two if it comes back.

CspecRun

LOL...My SES light has been on since we turbocharged my car back in August. I have no cat and one of my 02 sensors unplugged...The light will go off EVVVVVERY now an again, but in a few minutes time it's back again.

J-SMITH69

mine never goes off unless i reset the computer lol

no rear o2s

i love increasing my carbon footprint in anyway i can

Slo_crx1

Once the anti-fouler is on there you won't have a problem, as long as you didn't drill it out too large. Mine's been on since last august with no SES lights.

Smith-02

5 cold starts so far since installing it, no cel. the mbc i bought from birdley can't adjust low enough to keep me from fuel cutting in 3rd... my favorite gear. i got a nice cel from that tonight

i think i run a little richer now, i get more of a let off the gas backfire than what i did before, and my mileage seemed to go down a little faster after 1/4 tank.

kain

remove the mbc when you get the cobb tuning software in your car.

Smith-02

i took it out because lowest possible setting caused fuel cut in 3rd. rock solid 1.2bar in first/second

88dx

should have bought a EVO subarus are junk :1

Smith-02

if evos are so good, go ---- yourself, i don't care. i'm sticking with the wrx. buy your own evo.