Exhaust ( muffler)

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Jul 26, 2005 | 09:48 PM

gunfighter1

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Exhaust ( muffler)

I was told that if you remove the muffler the truck would tow better and run cooler. Is this true and would it be to noisey.
bob

Jul 26, 2005 | 10:11 PM

johnny8

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Joined: Nov 2004

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From: New Hampshire

replace your stock muffler with the walker big truck muffler if you don't want to spend a lot of $$ but you want to improve the exhaust flow and lower the egts...

Jul 26, 2005 | 10:13 PM

fishmanndotcom

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Joined: May 2000

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From: Senoia, GA

on a powerstroke it's not all the more noisey at idle but when hitting high RPM's it does start to rumble. but it sounds really good! yes you will lower your egt's since the muffler isn't there to hold in heat and backup exhaust.

i run a tymar 3-3.5" DP with a 4.5" straight pipe all the way to behind the rear axle. i love it.

-cutts-

Jul 26, 2005 | 10:49 PM

arninetyes

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Gunfighter1, it depends on the year of your truck. If you have an OBS (original body style), the muffler really isn't bad. It is a straight through design and a Walker BTM won't give much improvement. However, the squashed downpipe is a disaster and needs to be replaced right away. A 3" DP will fit with only very minor mod to the firewall.

If you have a 99 or later Super Duty, they come with a nice, smooth 3 1/2" DP (which reduces to 3" next to the firewall), but have a crappy and restrictive reverse flow mufller. If you have a 99 or later, replace the original muffler with Walker BTM for a nice improvement in EGT and sound.

Jul 26, 2005 | 10:51 PM

opnekryan

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Joined: Jul 2003

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From: MD

If you have a cat on there it won't sound a whole lot different just a little louder in the high RPM's like fishman said. I removed my muffler before I removed the cat, and the cat make a much larger difference in sound!!

Jul 27, 2005 | 08:12 AM

rmilchman

Elder User

Joined: May 2002

Posts: 858

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From: Robbinsville NJ

I removed my muffler and like the sound. When I was thinking about doing it someone sent me a wav file. I've posted it for others, www.milchman.us/nomuffler.wav