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Exhaust 5.9L Exhaust Discussion


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  #1  
Old 01-01-2011, 03:24 PM
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Default 09 5.7 dual exhaust size?

Cant seem to find what I need! I have plans to replace the muffler on my truck, but need to know what size the pipe is on both sides of the muffler!

I am looking at either the flowmaster 40 or the mufflex 14, gotta have it LOUD! Paired with the AEM Brute Force CAI, it should give a really good rumble!
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Old 01-01-2011, 04:04 PM
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if you go single in / dual out it would be 3" in/2.5" out.

This is not to match the existing dual system of course, it's just to give you enough back pressure and not suffer a low end torque loss.
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Old 01-02-2011, 02:25 AM
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Thanks Maddog! I cut out all the hassle of the flowmaster order chart and went with the Mufflex 14". From all the YouTube videos Ive watched, it sounds the best to me. Loud enough to peeve off the neighbors works for me! LOL Instead of trying to bolt it up and worry about leaks, I think Ill just go ahead and weld it in place. Cheers!
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Old 01-02-2011, 03:13 AM
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Good idea. Let us know how it all works out.
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Old 01-02-2011, 07:42 AM
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I have heard good things of the Mufflex. I would also weld it up. Makes it much cleaner and leaks can be annoying in sound and performance quality IMO.
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Old 01-05-2011, 08:16 AM
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my stock 2010 is single in 3"; dual out 2.25". I used a magnaflow 18" replacement and 3" of pipe extension in the front...not exactly a direct swap, but not hard either.
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