[04_Sti_Blue]

Sup guys, ive owned my 04 STi since it has 0.3 miles on it. And Recently i have been getting bored of the power. I have installed over time a Cat back exhaust, and Cold air intake and Blow Off Valve for asthetic purposes. Well i just recieved my megan downpipe from a online user. So i have recently decided to go with a Pro tune from a local tuner in the SoCal area that i hear is really good. So with the downpipe i have what i need to go stage 2. But i want to throw something else in the mix since im goin to spend the money on a pro tune.

Here is what i have came up with.
It can only be one but i dont know witch one witll give me better gains.

1.Exhaust Manifold Crossover Pipe
2.Uppipe
3.Walbro Fuel Pump
4. Injectors

That is alll i have came up with. So with the addition of a new DP what else should i get that will gain my car the most power? Preferebly top end! All help is greatly appreciated! Also since in installing the downpipe is it worth it to get the waste gate port and polished?

[JD_STI]

Who's tuning the car?

First things first, get rid of the BOV

A Walbro wouldn't hurt. That & what you already have is all you really need.

[zim2322]

the walbro and fuel injectors wouldnt hurt at all, so ur tuner cant run out of fuel to play around with when tuning

[krich]

Headers and up pipe would be nice. Dont really need to up grade the fuel components yet until turbo upgrade.

['05CrystalGray]

In my opinion the fuel pump is necessary for a protune, it is just insurance. You shouldnt max out your stock injectors with a stg 2 setup, so those will be fine.
None of your other mods will net you that much power and are probably just a waste of money if you arent going to add a different turbo.
Have you thought about getting your stock turbo ported and coated, that will help with spool and it will keep under good temperatures down.

[tyler_sti]

Get rid of the BOV, electronic boost controll selinoid(bcs), and fuel pump. All you really need. you'll be happy with the numbers!

[krich]

you're not even close to maxing the injectors on stage 2. Fuel pump is not necessary unless you have a regulator

[BWG]

Originally Posted by krich

you're not even close to maxing the injectors on stage 2. Fuel pump is not necessary unless you have a regulator

BS, I maxed the stock injectors with a stage 2 protune.

[FlyingPerformance]

Get an aftermarket BCS(I make a BCS kit), walbro, and if you want to injectors. I have a tuned stage 2 car with a Walbro, APS CAI, BCS, and a TurboXS TMIC and came close to maxing my stock injectors. The deal with running out of fuel or not when tuning a stage 2 is all in how the tuner gets the power out of the car. I am not a tuner, nor do I claim to be, but there is more than 1 way to skin a cat when tuning these cars: more fuel, more timing, more boost, etc.... You could run a meth injection setup and keep the stock injectors. You would pick up more power and still be safe with your stock injectors.

[LSE]

I got:
header + uppipe.
injectors.
CAI.

I already had the pump.

[suby OCD]

Decide your budget, then talk to your tuner and ask what they prefer. You dont want to buy a short ram intake and then find out your tuner prefers a cold air intake. Some tuners can be picky.