How would you guys mod an STi next?

[Subaru18]

Lets say I got the COBB Stage 2 Power Package. It comes with a catalytic turboback and a accessPORT programmer. The car should have around 350 hp at the fly wheel and around 277 at the wheels.

What would you guys do next to add some more power?

[moger21]

i would say do a uppipe and a downpipe, and maybe a cold air inake

[ragnarok720]

larger turbo

[donkeyboy]

ide buy a turbo timer, so u can keep it around a little while, also so u dont have to sit in the car to let it cool down

[fatninja19]

Originally Posted by moger21

i would say do a uppipe and a downpipe, and maybe a cold air inake

He already has a turbo back, so there's no need for a d/p. An Up-pipe would be good.

A turbo timer would be a great idea, especially if you lack the patience to sit in the car and let her run a bit before turning her off(like most people do). An upgrded top mount intercooler or a front mount intercooler would be a good idea. After you get the intercooler, you can be sure that you run cooler temps, and from there, you can also up the boost. An upgraded turbo would be awesome, as would some headers for your car. Those things do wonders.

It would also be a good idea for you to purchase some guages to monitor everything.. EGT especially since you'd have a wide open exhaust.

[NerveAgent]

Turbo Timer

[VTEC V6]

A turbo timer or cold air intake are a waste of money!

When you look under the hood you can see that there are coolant lines running to the turbo so its oil and water cooled. No need to wait there and sit for it to take a cool down lap.

Also many reviews and dyno tests have shown that intakes give you very minimal gains on the STi, I'd just take out the resonator and call it a day. I took mine out a couple of months ago and felt no power difference whatsoever but the sound you hear now when in boost and when its releasing pressure through the bypass valve is nice.

With the mods you already have I'd consider a header/up-pipe combo like GT spec makes.

Or if you crave even more power replace the Cobb AP with Turbo XS's UTEC. People on other boards have posted dyno charts with hp figures of over 300whp with just the UTEC and a turbo back.