MBRP 4" with muffler? - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 11-01-2012, 05:55 PM Thread Starter
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MBRP 4" with muffler?

Hey guys, I have recently purchased an early 99 7.3 6 speed 4x4. I am in the process of doing a 6637 intake (as in i have the parts i need to find the time to throw it on) I want to get gauges soon ( already asked questions and had them answered in another thread) and last thing i want to do for now is exhaust. Here is my dilemma. I cant have my exhaust be super loud. I was looking at MBRP's 4" with a muffler and was wondering, how loud it was? Is it much louder? My main objective is to flow better obviously, but I would like to keep it on the quieter side for now. How about their system without the muffler? How much flow does the muffler restrict?
Thanks in advance,
Dan.

Last edited by 03machstock; 03-04-2013 at 01:21 PM.
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post #2 of 12 Old 11-01-2012, 06:04 PM
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2001 F-250 Superduty Powerstroke 7.3 with 4in MBRP exhaust - YouTube

Thats a link to mine with the muffler and 4".
Not "loud" but not as quiet as stock.
There's not much to the muffler... Its a straight through design.


2001 Ford F-250 SD CCSB 7.3 PSD - AIS Intake, Zoodad,
MBRP 4" XP Series Exhaust w/ Muffler, HD4R100, 26 row Trans Cooler, Fumoto Valve,
285/75R16E BFG AT KO, Pioneer AVIC-Z130BT Nav, BOYO VLT-422C Back Up Camera,
Scangauge II, Glowshift 3 Gauge Pod (EGT,TFT,Boost), PHP FU Chip, Huskyliners, Huskyliner Mud Flaps, Warn Premium Hubs, Riffraff Boots/Clamps/inserts
Dyno'd at Mo's Speed Shop 11/3/12 - 307rwhp / 651rw ft-lbs <<<--- On PHP 120Race tune
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post #3 of 12 Old 11-01-2012, 06:13 PM Thread Starter
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Its hard to tell overall volume from a video, but I think that sounds real good! Anything you would do different if you had to do it again? Is it hard to sneak around with that exhaust if you keep your foot out of it?
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post #4 of 12 Old 11-01-2012, 06:17 PM
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Nothing I'd do different.
I don't think i could sneak around with it stock. Its not obnoxious. As long as you don't hammer on it when you take off its not that bad.


2001 Ford F-250 SD CCSB 7.3 PSD - AIS Intake, Zoodad,
MBRP 4" XP Series Exhaust w/ Muffler, HD4R100, 26 row Trans Cooler, Fumoto Valve,
285/75R16E BFG AT KO, Pioneer AVIC-Z130BT Nav, BOYO VLT-422C Back Up Camera,
Scangauge II, Glowshift 3 Gauge Pod (EGT,TFT,Boost), PHP FU Chip, Huskyliners, Huskyliner Mud Flaps, Warn Premium Hubs, Riffraff Boots/Clamps/inserts
Dyno'd at Mo's Speed Shop 11/3/12 - 307rwhp / 651rw ft-lbs <<<--- On PHP 120Race tune
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post #5 of 12 Old 11-01-2012, 06:25 PM Thread Starter
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Originally Posted by BryceB View Post
Nothing I'd do different.
I don't think i could sneak around with it stock. Its not obnoxious. As long as you don't hammer on it when you take off its not that bad.
Thanks for the video and input, im liking your exhaust a lot.
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post #6 of 12 Old 11-02-2012, 12:53 PM
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I have the MBRP 4" with the muffler and I don't think it is loud at all. If my wife hasn't complained, it must be some what quite.

2002 F 250 CCSB, 7.3, 4" Exhaust, DYI Intake, RiffRaff Frx, PHP Hydra, CCV mod, Trans, EGT and Boost Gauges, 2.5" Lift, 35" tires.
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post #7 of 12 Old 11-02-2012, 04:19 PM
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I threw the 4" MBRP muffler back there. It's not louder but it's meatier. The sound is way better, but you didn't amplify anything.
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post #8 of 12 Old 11-03-2012, 06:45 AM Thread Starter
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Thanks guys, sounds to me like I should not be getting complaints from this system. I appreciate the responses.
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post #9 of 12 Old 11-04-2012, 12:07 AM
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Check it out, the same set up you are looking at. Loud enough to keep the right foot in check at 3am when I get home from work, but loud enough to have fun at 3pm

Heres the truth, the engine is louder than the exhaust, at least in this set up. So as long as you go with that, you have an easy explanation; "Its not my exhaust, its the engine. I cant quiet the engine."




- Trey
"Jaws"- 2002 F250 XLT CrewCab Short Bed 4x4 7.3L

Phoenix 6pos (Stock, 65dd, Whisper, 100p, 120r, 80t), 6637 Intake, RR-IC Boots, OEM Black CPS, DeFoiled, 08 Tail Lights, MBRP TB 4" w/ muffler, Firestone load bags, 05+ Tow mirrors, Custom Flag Mount

My Youtube videos
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post #10 of 12 Old 11-04-2012, 05:32 AM Thread Starter
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Thanks for all the input and replies guys!
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