Fs 02-07 limited grimmspeed downpipe. Coated and catted.
The full monty.

$600 cash walks away with it.

2000 miles on it.

 

Different direction? selling the subi?

 

No lol. Planning on going twin scroll.

for now just going back to stock map and stock dp to free up some debt. That grimmspeed dp broke my bank. Paid over 650 for the little bastard.

 

Bump!

 

Ahh yeah i get that. I thought about going T.S. but that would mean selling everything I already have (turbo, both DP's, Swain coated EL Tomei header/up) and that made about Zero sense to me. What about smog time what DP will you be using to pass once you go T.S.?

Bump for a dope part and a cool dude.

 

An oem jdm sti twinscroll downpipe. They are catted.
Oem from the manifold to the downpipe.

I have my eye on a vf37 on nasioc with all the oem bits.

 

Welcome to the VF37 club

I've a full setup, just waiting on getting my car back and few other things before I put it on.

Do you have the JDM downpipe difference sorted out? It's about 4" less than USDM length between the midpipe and the end of the DP. Running a JDM length exhaust is a solution, if an at times expensive one.

I'm getting a spacer fabbed at a muffler shop, could get one made for you at the same time if you like.

 

Id like to talk with you more about the gains with the setup. I have a 2.5 so the oil sump should be no problem.

I know this is an awesome upgrade to 2.0 but idk about a 2.5. What are the gains I would see after being protuned do you think?

I was also looking at a vf42 ts.

Another thing to consider is my trans is a 4eat so the stall on the tc will need to change as well im sure.

For the oem setup the guy wants ~1800 + shipping. Manifold, up pipe, turbo, downpipe, o2 sensors, ebcs.

And yea I was thinking the same thing about exhaust. Ive seen some cheaper jdm length ones for sale but an adaptor would be fantastic.

Some people say to just adapt a usdm downpipe on there but that kind of defeats the purpose yea?

 

This is what they guy who sold it to me (who also will be doing the tuning) had to say about it.

He put a Born Warner 20G on his 2.5.

From my quackulations and research, the VF37 compressor is the same size, or at least darn close, to a VF22, which has a max CFM of ~14m^3/minute, or 494CFM, or about 350 horse at the flywheel. But don't quote me there (I can send the Excell file and ref documents I used to get to that figure). The real unknown is how fast and at what RPM it gets to that point, which gets hard to extrapolate without real world data.

The TS's advantage is quick spool, which in having a 2.5 you already have that displacement edge on. A big twin would be dope, but I read some singles can outspool a twin. It's all horses for courses, and there's a lot of variables and compromises to consider.

An adapter, out the door, would be <$100. Flanges and labor are the main costs.

More talk later, gotta get back to pretending to work, but let's keep up on this.

 

leaferikson and iflycoach are two guys I know running on 4EATs, and might have some insights if you hit them up.

 

I know erik and andrew lol. Ive been under the hood of both their cars. One for suspension and one for a boost gauge lol.

Erik just went back to stock downpipe and andrew is running a perrin rotated setup.
Both are 2liters tho.

Andrew had some good insight on a few things and he reccomends a 16g and a built trans. I like the idea of an oem twin scroll setup for smog purposes. That would pass easily.

 

Oh that's right, I remember you telling me you got some parts off Andrew.

Did you want to stay auto? I know you can build them, just not sure how readily offhand? I'm going 6MT if and when my trans goes, which building it and the motor would indeed preempatively address, but my budget's limited.

Andf yeah, the VF up pipe(s) and downpipe have Subaru badging on them, they look totally kosher.

 

This is another reason why i stuck with a Single vs TS. My single will spool up fast and make very good power. the whole cost to go to TS didnt seem like a smart purchase when i wont be making more power or reaching said power more quickly.

 

If your profile tag there is accurate, your 2.5L STi has got that displacement advantage. My 2.0L rex isn't as hefty there, so nabbing some of that low end, *and* getting more top acceleration appeals to me. Like I said, the guy who sold it to me put a 20G on his 2.5, and he's running on E85 too.

If nothing else, it's something different equipment-wise and sound-wise with the EL headers. People have paid far more for far less performance gains in the name of that (though that's more like say wheels and body kits, cosmetic stuff).

Diff strokes diff folks

 

Mines a 2.5. I know the vf37 will give me a lot more power than my td04(how much? I dont know)....but im stock wrx internals and the way I figure.....I can get a whole oem twin scroll kit pieced together cheaper than buying aftermarket parts. My downpipe alone was almost 700 bucks!! Catback was 600 bux.
I actually found a nice vf37 brand new on ebay for 400 bux too. The price for me to do a vf48 swap at this point in time is far more than selling the aftermarket stuff I have going back to stoxk and venturing down the twinscroll lane. Question is should I keep the AP for tuning or go find a cable and go OS. If I ever wanted to switch back to single scroll I could just reflash to stock with the AP......sounds smart