ideal exhaust size? - Jeep Commander Forums: Jeep Commander Forum
Exhaust Questions or advice about exhaust systems? This is the place...

 
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post #1 of 6 (permalink) Old 12-17-2010, 04:13 PM Thread Starter
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ideal exhaust size?

Anybody know what the ideal exhaust size is for the 5.7? i plan on running a cai and a programmer. I was thinking 3" would give me the best results but im not too familiar with the 5.7. any help would be great.

2006 Commander Limited, Jeep green metallic w/ Saddle Brown. 5.7 HEMI, Quadra-drive II system.
Brutforce Intake
3" catback with magnaflow
Diablo tuner
2" Budget boost
1.5" wheel spacers


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post #2 of 6 (permalink) Old 12-18-2010, 06:15 PM
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My 08 Hemi has a 3" exhaust.

BCB
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post #3 of 6 (permalink) Old 12-19-2010, 08:21 AM
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BCB: Is that 3 inch setup a Gibson? I thought the OEM pipes are 2-1/2" diameter .

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post #4 of 6 (permalink) Old 12-19-2010, 08:24 AM
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OEM exhaust systems are 2 1/2 inch diameter. But if your looking to add more performance then I'd go with 3 inch. Especially if you will be doing a few other mods to the engine.




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post #5 of 6 (permalink) Old 12-19-2010, 05:01 PM
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When we installed the Magnaflow, the inlet and exhaust was 3"ID. The stock resonator also measured 3"ID. I bought it used but I don't think it was modified.

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post #6 of 6 (permalink) Old 12-19-2010, 08:54 PM Thread Starter
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Sounds like I'm going with 3". I really like the Doug thorley but its only 2.5". Guess ill settle for the magnaflow.

2006 Commander Limited, Jeep green metallic w/ Saddle Brown. 5.7 HEMI, Quadra-drive II system.
Brutforce Intake
3" catback with magnaflow
Diablo tuner
2" Budget boost
1.5" wheel spacers


1990 Grand wagoneer
4" Bjs off road
1" HD shackles
33" BFG KM2
Roof rack

Ready for exploration!
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