Hello,
I own a 04 sti.Im looking to Purchase a down Pipe but am having a hard time.Is there anybody that is looking to sell one ???? I would perfure One that had the o2 sensor port installed as I dont Currently have a tune yet.I know If I go catless it will pop a code..But as soon as I get my tune that will fix my issue.Any help would be appreciated.I will pay a good not trying to low ball anybody,Just looking for a good deal.....



Thanx.........

 

Night Bump Help a bro out......

 

what kind of downpipe are you looking for?

 

Doesn't matter what brand.Do you have one for sale? Or know were I can get one?

 

theres more to consider then just a "down pipe". You should state whether you want a catless or catted downpipe or hi-flow cat. and also bell mouth or divorced waste gate. i would personally get a bellmouth catless. as far as brand goes thats up to you

 

Ebay has tons of em if you need one ASAP. They're not that bad at all, seriously.

 

Invidia catless bell... you won't be disappointed!!

 

All a downpipe does is route exhaust from the turbo/wastegate to your muffler. You could have an exhaust leak that sounds like a cut-out or run a 4" downpipe and it would still run the same. Your wastegate port is where it really counts. I can totally see not buying a header, uppipe, or anything before the turbo from ebay because the welds may suck, and that's the major area of boost leaks, leading to power loss or foreign object damage. A good ol' used downpipe is as good as buying a brand new ebay downpipe.

 

Yea I deff Agree with the Purchase of a used down pipe I'll save some Money Compared to a Ebay Down pipe which may give me issues later and is why I havnt Purchased one from there yet.But A Catless Bellmouth would be Good.Or a High Flow Catted pipe..

Wats the Difference in a Divorced downpipe and one thats not?

 

A divorced dp is exactly what is says, there's a wall and/or separate tubing that isolates the turbine from the wastegate port for less turbulence compared to the stock setup. The stock dp blocks the wastegate port from fully expending boost freely, and therefore interfering with the turbine outlet gases.

A bellmouth dp is just simply a large turbine outlet dp (normally 4") that tapers to 3". Basically, it allows the exhaust to escape freely and the wastegate port to expend excess boost without restrictions at the same time.

 

So What Are the Benefits to having A Divorced Set-up? It seems like A Bellmouth dp is the way to go allowing more airflow into the exhaust..

 

NIght bump.......

 

Well it doesn't really matter. Divorced dp's work like recirculated ewg setups do, like routing back wastegate exhaust downstream of the turbine. Bellmouths dp's just give more room, overall. You decide which one you like, its all a matter of preference.

 

Cool thanx Bro....Deff helped clear up my confusion..