2.5" or 3" Turbo Back

[eclipsemf]

I am looking to upgrade my stock exhaust with a 3 inch turbo back. My one question is would i loose any power by going straight to a 3" as aposed to a 2.5"? As of now I just have the stock t-25, but i have a evo 16g on the way and im just waiting to put that in untill i get a way to tune and the supporting mods. I found one thread from 03 kinda about this but it didnt answer this question directly. Thanks for the help!

 

[Bud92gsx]

Go with the 3 inch so you won't have to upgrade later..

 

[Absit]

You won't lose power by going 3", but if a 2.5" is enough for your goals (and it is for an E316G on pump) I'd go 2.5". It'll be cheaper, quieter, and will help prevent boost creep.

 

[jb2zero0six5]

3" All the way! It also sounds very nice.

 

[9!'clipseDOHC]

Since 3" is so popular its actually sometimes cheaper then 2.5". A 2.5" exhaust would help with boost creep issues on that 16g so that is something to consider. I personally would, and did, go with a 3" exhaust (and I'm still on the 14b).

 

[scott90gsx420]

Like others said. 3inch. Its the best rout because for one you won't have to upgrade again. Two it sounds nicer. And 3 is its just cool to say youve got a solid 3 inch tube the whole way back . Boost creep is going to be an issue but if you get the turbo's wastegate ported or buy a external gate then youll eliminate that issue as well.

 

[DSMxJB]

I have a 2.5" o2 housing a 2.5" inlet downpipe 3" outlet (catless) and a 3" catback and I have no boost creep problems on my t25. It sounds really nice too imo.

 

[eclipsemf]

Yea I think I will go for the 3". I wasnt plaing on modding this car at all, now im going to a 16g so im sure in the future i will be seeing a MHI 20g! Thanks for the advice

 

[2GbTalonGuy]

Go with a 2.5" inlet DP that opens up to 3", then 3"catback.

 

[eclipsemf]

Go with a 2.5" inlet DP that opens up to 3", then 3"catback.

Doing this would get rid of boost creep right? that way i wouldnt have to get it ported

 

[9!'clipseDOHC]

Doing this would get rid of boost creep right? that way i wouldnt have to get it ported

No, it will just make it easier to bolt the downpipe to the o2 housing.

 

[Boosted98gsx]

Go with the 3 inch so you won't have to upgrade later..

came here to post this.