Quieter Muflers for 33?

[wallace18]

Has anyone used a different muffler that is much quieter than the FFR ones. My wife's 33 is way too loud.:(

[33fromSD]

I'm the opposite, I wish the FFR mufflers had a bit more rumble to them

Jim

[JimLev]

There was a post a while ago by another member looking for some quieter mufflers. There were some recommendations, not sure if the original poster ever replied back.

I love the FF5 mufflers, they sound great.

[RoadRacer]

I don't like mine when driving. at idle they are fine, but they kinda rattle and sound tinny driving. But I don't think I've heard many recommendations.. in any case I won't change for a while, when you're going fast enough the wind and road noise takes over :D

[Brastic]

I also have the stock mufflers. They are OK. I do not mind them, but they are not a great sound. I love the side pipes in my Cobra. I could listen to that music all day long. After a couple of years, I might think about getting the FlowMaster mufflers or just make my own. I have downloaded some University papers on mufflers and have been going over the math. If I get more time, I will see what I can learn.

[progmgr1]

As a Mechanical Engineer who worked in a muffler design/manufacturing plant back in the dark ages (early 70's), I would not recommend attempting to design your own muffler. Maybe with modern CFD software you could get something workable, but last time I looked it was still a problem that was too complex for the computational power available in a normal home or office computer. At least traditionally, muffler design was always part magic and part trial and error - even with the best software available. Personally, I would rather give my money to Flowmaster or Borla and spend my time elsewhere (but then, it would be an interesting intellectual exercise.) Keith HR #894

[33wanabe]

I would also like to find quieter mufflers, my kit came with ball & socket pipe connectors that would need to be cut off and reused.

[NAZ]

If it's too loud, you're too old.:o

I've tried several methods to quiet down my exhaust and finally got it to 95db (at 50') and gave up. Like Keith said, buy an engineered muffler if you can. I just can't find a store bought solution that'll work. So I wear ear plugs on the street.

[progmgr1]

You could look in this old thread for some ideas: https://thefactoryfiveforum.com/showthread.php?38926-FFR-mufflers&p=456049#post456049

Keith HR #894

[J R Jones]

Wallace, back in the day the fuel injected C2 Corvettes (63-67) had a terrific sound, at idle and under acceleration. That sound was locked in my memory.
In the late seventies I bought a 74 Corvette (350ci)from a buddy living in the same condo with underground parking. I put the 63 mufflers on the 74, bolted right up. They sounded great, and John was astounded when he heard it in the garage.
My mufflers were OEM and getting accurate replicas would be a challenge. They were medium size ovals with 2.5 inlet. I see them at various prices on the internet.
Another feature would help with your existing mufflers. An "X" or "H" pipe connector near the collectors will take out harshness, lower DB and improve performance. The noise sounds like higher RPM frequency than it actually is.
jim

[Bob Cowan]

Years ago I welded a pair of 30" Classic Chambered mufflers in place. Huge improvement! It decreased the overall sound by a large margin. And it also softened, or mellowed, the sound. Got rid of the tinny "blat" from the FFR mufflers. Looked better, too.

[Kamp]

Having read some of the comments on the forum and having my Wife as a frequent rider used "turbo" mufflers when I did the exhaust. Its still very noisy inside, hard to even hear the radio.

If someone has used the 4 or 5 chambered Flow Masters that would be interesting to know about.

I have considered using small resonators where the pipes come down over the rear axle and rear exhaust is quieter than the side ones.

[Bob Cowan]

Even with good mufflers, it's still a noisy ride. Wind and tire noise will really wear you out. Do a search on "ear plugs".

[Tampa33Build]

I added Hedman Hedders 17104 -Dual Resonator Exhaust Tip, helped some.
Still looking for quieter mufflers.
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