I have a 2005 STI.... I was just wondering, i already have the Unichip stage 4, and just a intake and HKS blow off valve, no exhaust... But wanted to order the equal length header and downpipe from Subisoltion... What would that put me at....???? Will be order the turbo back exhaust in the near future... Need some input....!!!!!

 

15 more hp?

 

I would get the TBE first, gets rid of the restrict from the cats. Or at least a short downpipe with a bellmouth.

 

That Unichip needs to be tuned for whatever mods you have. If you deviate too far from what it is tuned for, you risk engine damage. What company tuned that 'Stage 4' Unichip?

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0==WW==0
"…axles of evil…" - george w. bush

 

That would be Subysolutions... The guy from Subysolutions.... He also told me that.... with all that plus the bolt on headers and down pipe and exhaust that he has, i'll be close to 380 whp....

 

I think that he is pulling my chain.... what do you guys think???

 

I looked at Subysolutions.com and it appears as if they do not develop their STi upgrades in-house, but contract GPMoto for upgrades and tuning.

As for 380 whp from headers, turboback, and tuning, that number sounds 'optimistic'. Ask them for a dyno chart posted somewhere. You might ask GPMoto directly to see the charts and find out what type of dyno they used. What's important is that you should go with a reputable tuner that knows how to make safe power for your street-driven vehicle.

Bear in mind that you should avoid comparing dyno numbers from two different dynos, especially if the dynos are from different manufacturers.

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0==WW==0
"…axles of evil…" - george w. bush

 

so are you saying those numbers are in the ball park... Because if that was the case then, wouldn't everyone get this then???? Sounds too good to be true.... this guy i met that has an Evo.... said thats also not possible... I'm confused.... gotta go to a dyno, huh???

 

IMO, those whp numbers are way off what the stock STi VF39 turbo can produce, even with a good turboback exhaust. You might speak directly with the GPMoto, as they are the ones who do the actual tuning, not Subysolutions.

--
0==WW==0
"…axles of evil…" - george w. bush

 

I knew it!!!!!!!!!! Thats what i was thinking.... I think that i just got scammed into buying more parts that i was told that i would be hitting those number... Its good to have though... Thanks....