Mufflers

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Apr 18, 2026 | 06:00 PM

Copeyboy

Thread Starter

Cross-Country

Joined: Sep 2024

Posts: 50

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Mufflers

Right now, I've got a pair of Black Widow Venom 250 mufflers on my '64 F100 and I'd like to go a bit quieter. Do any of you fine people have any thoughts/suggestions on good mufflers? I'd like to stay with one that won't inhibit exhaust flow and is 2.5 in diameter. Thanks for any assistance anyone can give.

Apr 19, 2026 | 04:57 PM

skidoorulz

Fleet Mechanic

Joined: Jan 2014

Posts: 1,529

Likes: 271

From: Billings Montana

Quote:

Originally Posted by Copeyboy

I have 2.5 inch magnaflo's on mine (292) I am going to put a 2 inch crossover in it to mellow it out a bit more

Apr 20, 2026 | 09:48 AM

8Line

Tuned

Joined: Apr 2024

Posts: 265

Likes: 112

From: South Houston

Porter mufflers.
A few videos online, and on their website. pricey but really nice. louder than my old super turbo's but a great sound. not bad when cruising, can here it when stopped at a light and sounds nice.

Apr 23, 2026 | 07:32 PM

1966F100SC

More Turbo

Joined: Jun 2020

Posts: 554

Likes: 13

I use flowmaster FlowFX, similar to a glass pack sound but more tame.

I did 2.5in stainless right over the rear end. I have thought about an X or H pipe but have not done it yet.

Apr 23, 2026 | 08:17 PM

theastronaut

Laughing Gas

Joined: Mar 2013

Posts: 770

Likes: 309

Adding resonators after the headers/manifolds will absorb harsh/raspy tones, and an H or X pipe will also smooth out the tone. Vibrant Ultra Quiet resonators would be my choice.

Apr 24, 2026 | 07:52 AM

AZSCAWPION

Fleet Mechanic

Joined: Dec 2016

Posts: 1,255

Likes: 698

You don't mention any specifics, but sometimes the things we overlook can have a huge effect. Lots of variables too. Do your pipes run out the back? Headers or manifolds? Extending the pipes out the back will quiet things down a bit. Header wrap will quiet things down a lot! I started with flowmaster 40s. Wasn't loud enough for me. Went to 10s. Loved it. Eventually did a header wrap to help with underhood temps and now sounds like it did when I had the 40s on there.

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Last edited by AZSCAWPION; Apr 24, 2026 at 07:58 AM.

Apr 24, 2026 | 09:03 AM

Crop Duster

Logistics Pro

Joined: May 2015

Posts: 4,463

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From: Tri Cities, TN

Quote:

Originally Posted by AZSCAWPION

40's weren't loud enough

I have 40's with 2 1/4 pipes and they are a bit too loud. I also have 3-inch vacuum operated exhaust cutouts for when I do want to be loud with no back pressure.

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Apr 24, 2026 | 12:04 PM

Pickupmanx2

Lead Driver

Joined: Jun 2006

Posts: 5,635

Likes: 963

From: Near Yosemite CA

Exhaust note/sound is like wheels and tires... everyone has their fav's, personally, I'm a fan of the old school glass packs, the shorter the better, and as close to the front/manifold as possible, then long pipes exiting behind the rear tires, always has a nice cackle on decell and down hills, the longer they are, the more mellow it is. On my 2 77's, one F150 4x, one F250 4x, I have resonators off a newer F150, close to the engine, I get lots of compliments on how they sound and they aren't harsh inside the cab, 2.5" in/out the back behind pass. side wheel.

I'm liking the cut-out idea for Mater my 63 when I get him going... for those times I want to be a little rowdy

Apr 24, 2026 | 01:03 PM

#10

Crop Duster

Logistics Pro

Joined: May 2015

Posts: 4,463

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From: Tri Cities, TN

Engine Masters did a show on exhaust cutouts, surprisingly they recouped almost all of the horsepower that was lost with a full exhaust and mufflers. I always thought they were for more noise. I put mine together with parts and pieces off of e-bay. The vacuum type is instant on or off, but you do have to have a vacuum reserve tank with a check valve to keep them from closing at wide open throttle.

Apr 28, 2026 | 01:35 PM

#11

Copeyboy

Thread Starter

Cross-Country

Joined: Sep 2024

Posts: 50

Likes: 12

Thanks for all the info, fellas. I should have given more details and I apologize for that. At the time, I ended at the mufflers, which I came to realize made it even louder. I also have the mufflers mounted near the rear of the bed, which also makes it a bit more loud in the cab due to reverberation through the bed. I still have the stock manifolds on there, but will be moving to the Mummert ram's horn manifolds in the future. Since my original post, I've extended the exhaust over my rear axle and added turn-downs. That has made a world of difference in the sound. I'm pretty happy with the results. My next step will be to add a crossover (probably an H-pipe for ease of installation) to help balance out the sound.