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Discussion Starter #1
My question is what better performance gains can u expect from a turbo back exhaust system (including Cat) in a 2.5" system vs 3" system.

From what I hear the slighly smaller pipe will give better Torque output than a larger diameter?

Also what about upgrades, I am planning on having the Stage 2 kit installed so that means a larger Turbo. So would that mean the 3" is a better pick?
 

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Discussion Starter #4
AEM cold air Intake system

just checked AEM has a part number now for the SRT cold air intake system
Neon 2003 Turbo Only 21-425

Bah rechecked its tsill not available yet.
 

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mrmixitup said:
Good link.

I'm going to wait to see dyno results of the various systems. I know Hector has already done a 3 inch and tested it.
hector already posted his dyno..its somewhere here.
 

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chubz said:
My question is what better performance gains can u expect from a turbo back exhaust system (including Cat) in a 2.5" system vs 3" system.

From what I hear the slighly smaller pipe will give better Torque output than a larger diameter?
Um, this aint a Honda, I dont think torque will be a problem for us. :lol: 8)
 

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el_jefe said:
chubz said:
My question is what better performance gains can u expect from a turbo back exhaust system (including Cat) in a 2.5" system vs 3" system.

From what I hear the slighly smaller pipe will give better Torque output than a larger diameter?
Um, this aint a Honda, I dont think torque will be a problem for us. :lol: 8)
Werd to that!...But yeah...my friend who owns a WRX just put a 3" turbo-back system on his car...he has driven his other friends w/ a 2.5" and he says he can notice a difference...dont know if that helps you or not...
 

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Aye 3" all the way if your making power :twisted: GHL is using 3" tubing on mine... Man I can't take the wait.
 

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My dyno results where flaud. I had the WG open a little. Ill get real numbers when my full system is done.


Oh, just so you know, a 2.5" system WILL support about 420HP before it becomes a restriction.

Corky Bells book , mAXIMUm boost has a good chart too:

 
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