MBRP Exhaust Qs - Ford Powerstroke Diesel Forum
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  #1  
Old 08-13-2010, 04:59 AM
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MBRP Exhaust Qs

Hello Guys;

Some 500 miles ago I installed on our 2003 6.0 Ford Excursion one of those 4 " MBRP Exhausts from the turbo, keeping the OEM Cat, and with the MBRP muffler, at idle the truck sounds great, until 60mph the sound is very nice. However, anything over 65mph the sound is too loud for my taste, is there anything I can do to alleviate this?

Maybe add another small muffler? Any suggestions will be greatly appreciated.
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Old 08-13-2010, 06:24 PM
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I went with the Magnflow for that very reason. I assume the noise your are referring to is the drone. I went with the Magnaflow after reading several posts about the MBRP's tendencies to produce drone. Im not sure what else you could do to quiet the sound. I would definitely lose the cat no matter what I did.
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Old 08-13-2010, 06:27 PM
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wow thats different, I have a 4inch on mine, and got rid of the cat, and doesnt sound bad at all, unless im just slamming the pedal it doesnt really sound much different then stock...
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Old 08-15-2010, 05:20 PM
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There's no major problem with drone in the pick up trucks...the excursion is an "Ambient Sound Magnifier" so the vehicle is much more sensitive to exhaust drone.
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Old 08-15-2010, 05:51 PM
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Thanks for the replay, it looks like I will have to modify the system any suggestions of what type of additional muffler I should install? brand name and where should be the ideal location
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Old 08-16-2010, 06:05 PM
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MBRP does make an additional "mini muffler" called a resonator. I guess they are supposed to help people change the resonating frequency on their exhaust systems check this out: Part #: R1009UniversalResonator 4" Inlet /Outlet 12" Body 18" Overall, T304 MBRP Inc. Performance Exhaust - Diesel, Gas, and Muscle Car Exhaust Systems

hmm
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Old 08-16-2010, 06:13 PM
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Interesting they sell such of thing but I will try to resolve this in a more economical way, thanks for the link!
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Old 08-17-2010, 05:27 PM
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Quote:
Originally Posted by Koda22 View Post
wow thats different, I have a 4inch on mine, and got rid of the cat, and doesnt sound bad at all, unless im just slamming the pedal it doesnt really sound much different then stock...
I kept the cat, but don't have a drone either!
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Old 08-27-2010, 05:02 AM
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I installed one on my Ex about 6 months ago and am happy with it but notice the drone also. My first thought was that the factory downpipe was insulated and the MBRP is not. It's primary function is for reducing heat transfer but thought it could make a difference on sound too. Thoughts???
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Old 08-27-2010, 05:05 AM
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Also what about all the joints. I got back under my truck to make sure all clamps are tight and they were but you can see small areas where the exhaust is leaking out (small black areas where the slit in the overlapping pipe is). What if I had the joints welded? Think that could make a difference?
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