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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

muffler recommendations

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Old Jul 26, 2019 | 08:56 AM
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muffler recommendations

Greetings friends.

I am reworking the exhaust on my 351W and I was looking for recommendations on mufflers that are high flow but not obnoxious loud.

The exhaust is true dual from long tube headers. It's 2-1/2" (if my memory is correct). The existing mufflers are kind of generic Chinese baffle types from a local auto-parts store. Was hoping to get better flow but not wake up the neighborhood when the truck starts.

thanks in advance!
 
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Old Jul 26, 2019 | 05:48 PM
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Magnaflow. Lots of flavors and case sizes to choose from. They are a 'straight through' design for high flow. The bigger and longer the case, the quieter.
 
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Old Jul 26, 2019 | 06:10 PM
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FlowMaster 40,s or glasspacks.
 
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Old Jul 26, 2019 | 08:00 PM
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Porter steel-pacs.
 
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Old Jul 29, 2019 | 09:24 PM
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Flow master has a new muffler (xt) that is straight through and like half the price of magnaflow
 
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Old Jul 31, 2019 | 07:26 AM
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muffler update

I ended up going with some cheap patriot long tube glass packs. I have a duel exhaust coming off of 2.5" tri-y headers. It doesn't sound as good as a resonator or a 3.5" exhaust but it still sounds decent. However, the flow is very nice. I kept the piping short. They turn down and out right before the rear tires, under the bump-side foot board.

https://www.summitracing.com/oh/part...3800/overview/


Muffler, Hi-Flo Glasspack, Header-mount, Round, Steel, Black, 2.5 in. Inlet, 2.0 in. Outlet, 34.5 in. Length
 
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Old Jul 31, 2019 | 11:12 AM
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Originally Posted by hivoltj
Flow master has a new muffler (xt) that is straight through and like half the price of magnaflow
Wasn't aware of that line (FLOWFX). Price is good for 409 SS. Would try them but there is no same side offset/offset configuration available.
 
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Old Jul 31, 2019 | 01:27 PM
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I'll be trying them on my 460 build with an x-pipe
 
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Old Jul 31, 2019 | 02:47 PM
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what does the inlet look like? some of the header mount glasspacks ive had in the past they just take a regular glasspack with inlet flange and all and stick in a collector and weld together
 
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Old Aug 1, 2019 | 08:52 AM
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I've got 28" thrush glasspacks on 2-1/2" header back duals. It gets loud when I stand on it, but at idle, you can barely hear it running from inside the house. Even standing next to it it's not loud. But definitely has a low tone rumble that carries.
 
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