Best “performance” muffler to tame the sound of a 4-inch straight pipe? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 10 (permalink) Old 07-30-2019, 02:24 PM Thread Starter
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Question Best “performance” muffler to tame the sound of a 4-inch straight pipe?

When I bought my 05’ F250 a few year ago, the guy had put a 4” turbo-back straight pipe exhaust on it. It’s a little noisy if you really get on the gas hard, but when you are just cruising around town or down the highway, except for the nice whistle sound…..it’s actually pretty quiet.


But…when I’m towing my camper with my family in the truck, it can get really loud when I’m getting on the gas hard pulling up hills, and stuff that actually requires some power. Anything over 2,500rpms just gets stupid loud….it’s annoying as hell on long 10+ hour road trips.


Is there a muffler I can put in the system that would kill a little bit of that wide open throttle volume, but not get rid of the whistle, or kill the exhaust flow?


If it’s on a 10 now, I would like to dial it back down to a 7…..

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post #2 of 10 (permalink) Old 07-30-2019, 04:15 PM
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I have a 4" turbo back diamond eye exhaust with their muffler. The muffler is straight through but seems to do a good job killing the unwanted frequencies.
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post #3 of 10 (permalink) Old 07-30-2019, 05:58 PM
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

I’m going to be putting in a Donaldson M090544 on my 7.3 to curb the noise and drone. Great flow but very respectable noice reduction.

I got truck stuff...
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post #4 of 10 (permalink) Old 07-30-2019, 06:10 PM
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

Subbed, same here, the 7.3 is ear piercing when climbing the grades


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post #5 of 10 (permalink) Old 07-31-2019, 01:18 AM Thread Starter
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

Has anyone ever tried the FTE spiral type resonator/muffler? They say it doesn't restrict the flow at all...and gets rid of the droning. Not sure if it gets rid of any of the volume though....

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post #6 of 10 (permalink) Old 07-31-2019, 05:46 AM
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

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Originally Posted by IQRaceworks View Post
Has anyone ever tried the FTE spiral type resonator/muffler? They say it doesn't restrict the flow at all...and gets rid of the droning. Not sure if it gets rid of any of the volume though....


I haven’t yet but if the Donaldson doesn’t quiet it down enough for me, then I’m putting one in just after the downpipe.

I got truck stuff...
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post #7 of 10 (permalink) Old 07-31-2019, 11:54 AM Thread Starter
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

Just ordered one of the 4" x 30" FTE spiral resonators. I'll have to take a before and after video this weekend when I put it on the truck.
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post #8 of 10 (permalink) Old 07-31-2019, 03:32 PM
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

sub'd!!! i can't wait to hear the before and after videos!!!


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post #9 of 10 (permalink) Old 08-04-2019, 02:46 AM Thread Starter
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

Well, I installed the new 4" x 30" FTE resonator. It did exactly what I wanted it to do....I couldn't be more happier with it. It got rid of that obnoxious "bark" when I was really hard on the gas. I can still hear the exhaust, it's just smoother now....quieter, and not so annoying. At idle, I can still here the turbo whistling....but I don't have as much as that annoying "hairdryer" type sound. It just took everything down at notch. The microphone on my camera is pretty crummy, it doesn't sound like it did much of anything in the videos....but in person, it's night and day.

I can't wait to tow something heavy.....I'm looking forward to being able to get on the throttle hard, without so much annoying volume coming out of the exhaust.

I'm working on editing the videos I took and putting them together....I just might not have time to do it tonight, it's going to take a little bit of time.
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post #10 of 10 (permalink) Old Today, 05:26 PM Thread Starter
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Re: Best “performance” muffler to tame the sound of a 4-inch straight pipe?

Just a little update......

Got to tow the boat (6,000lbs) this weekend. Man, it's so nice being able to carry on a conversation while pulling up a long hill when you are hard on the throttle No more....BRRRAAAAAAAAAAA!!!!! from the 4" straight pipe. Reply

I can still hear the turbo whistling pretty good with the windows down, but when you get on the throttle........it's sooooo much better. It's louder than a stock truck, but just not annoying as hell anymore. I wish I would have done that as soon as I bought the truck a few years ago!

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