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Old 12-13-2010, 12:45 PM
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4 or 5 inch?

Looking to install a MBRP exhaust and dont know if I should go with the 4 or 5 inch. Also not sure if i should delete the muffler. Any ideas?
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Old 12-13-2010, 12:52 PM
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I put 4 inch turbo back mrbp on mine with no cat or muffler and it sounds awesome. Not sure what engine you have mines a 6.0 If its stock then 4 inch is fine. but either way delete the muffler.
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Old 12-13-2010, 01:52 PM
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5" for noise. 4" is more than sufficent. If your going to delete the cat and muffler there is no reason to go to a 4" the stock pipe is plenty. 3.5 stock w/o a muff or a kitty is better on the budget.
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Old 12-13-2010, 06:37 PM
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go with 4. If you want the noise go 5, but it would be better to get the 4", You will not lose as much low end and the egt difference is minuscule.
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Old 12-13-2010, 06:40 PM
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How about 12"
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Old 12-13-2010, 06:42 PM
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i would go with a 4" straight piped version.... if you interested in prices let me now...

-Raul
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Old 12-13-2010, 06:47 PM
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i recommend 5 inch. sounds a lot nicer IMHO
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Old 12-13-2010, 06:49 PM
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5inch straight pipe
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Old 12-15-2010, 05:57 PM
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i got the 5" 6224al for 440is shipped from thoruoghbreddiesel or however its spelled. comes with the muffler but runs no cat. i didnt want it to loud but it still sounds mean i like it!!!
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Old 12-16-2010, 05:36 AM
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Quote:
Originally Posted by MCFR22 View Post
Looking to install a MBRP exhaust and dont know if I should go with the 4 or 5 inch. Also not sure if i should delete the muffler. Any ideas?
Delete the muffler and lose the cat if you can where you are... You will love it! Sounds great! I have 4" and am more than impressed.
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