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Old 07-05-2019, 03:55 PM
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Any recommndations for open header mufflers/noise reducer?

I'm trying to make my ride just a little more quiet than running open headers but without having to get a whole exhaust system. After running open headers for a while I installed the 3'' - 2.5" reducers that came with my new header and to my surprise that did reduce the exhaust noise at idle by a few decibels, however it's still very loud (but cool sounding) when I step on the gas. I found these header mufflers which would be ideal for my application as I'm trying to keep the setup simple without having to use pipes or welding, but I think they are a bit too pricey at over $200.. https://www.summitracing.com/parts/cci-ftd3025c.. . Any other less expensive alternatives? Thanks

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Old 07-05-2019, 04:34 PM
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Super trap or header mufflers circle track have to use.
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Old 07-05-2019, 05:50 PM
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If your headers are long tube or mid-length and have a typical 5" to 9" long collector on them look into muffler inserts.
Patriot and Schoenfeld are a couple I know of.

None of this short insert or collector extension type stuff is really going to do much to really muffle the sound for street use.....they exist entirely to fit rules governing tracks that have decibel limits. Those limits are still pretty darn loud, just low enough to take the "bark" out of full open exhaust.

Can't get around the Laws of Physics, about the only inserts that really work are 24-42" long to fit into sidepipes.
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Old 07-05-2019, 10:15 PM
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Look around at motorcycle baffle inserts. Available in multiple styles and diameters and can be fit in a generic exhaust tip I have taken them and cut one in half for 2 tubes.

Like Eric said they don't help a whole lot but they will take some of that raw bite off the exhaust note.

This shows the muffler case but you get the idea.
https://www.jpcycles.com/product/222...cement-baffles


This doesn't list the diameter but....

https://www.jpcycles.com/product/444...acement-baffle

Last edited by Hipster_G; 07-05-2019 at 10:22 PM.
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Old 03-02-2020, 12:09 PM
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Dont use the motorcycle stuff, look up header baffles, lots of different types avail from several header places. I have to find the link to the ones im using on open headers for my 383" Coupe

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Old 03-02-2020, 12:23 PM
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This is the place i was trying to remember, they have several different types: car chemistry
https://www.google.com/url?sa=t&sour...i1jDZLrTv0Hci9

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Old 03-03-2020, 01:56 AM
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Here's a news flash: anything you do - inserts, Car Chemistry, etc, are just forms of mufflers. You'd be better off running a real low restriction muffler.
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Old 03-03-2020, 08:40 AM
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Even though some of the aforementioned suggestions "tone it down" they generally won't stop highway "DRONE" , will drive you nuts , get some real mufflers ...
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Old 03-03-2020, 10:57 AM
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Is this like on a T bucket or open hot rod that you do not have a place for a regular muffler? Asking since you sighted the shortie in post.

Consider a weld on flange to mount to headers that has a bullet type glass pack also flanged. The cantilever weight should be concern if open on side like a hot rod T bucket. If under the car why not standard turbo’s?
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Old 03-04-2020, 05:25 AM
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Quote:
Originally Posted by Hipster_G View Post

Like Eric said they don't help a whole lot but they will take some of that raw bite off the exhaust note.

I'm sneaking in here. I'm looking for mufflers that do the opposite and let the "bark" or "raw bite" through, but not as loud as open headers. I could stand to take out some of the lower pitch sound but would love a bit of that open header sound. I currently have Dynomax super turbo's. Very deep sound.

The straight mufflers or resonators all mention something like a "deep aggressive sound" but I want some of that "crack" of open headers.
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Old 03-04-2020, 07:38 AM
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Put plain old straight cherry bombs or similar glass pack , won't take long for them to burn out , then they'll bark ...
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Old 03-04-2020, 01:17 PM
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Just inquiring ...where would one run exhaust as loud as open header if not on the track? But at the track just open the headers up.

Certainly the noise will attract the cops............No?

Stealth might be a more practical game.
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Old 03-04-2020, 07:04 PM
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Smithy's Glasspack, I know they restarted making them again...find a older hot rod guy to ask about how they sound...I heard very great.. I used walker turbo's on my IROC and they barked when I was WOT and had a great sound when on highways ....But also depends what size is your pipe's too (2.5 or 3 inch ? ). Do you have a X pipe or some cross over to each side ? You options very on how munch to lower sound...good luck

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Old 03-05-2020, 10:54 AM
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Augers

https://www.speedwaymotors.com/Search?query=augers
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Old 03-05-2020, 10:57 AM
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Quote:
Originally Posted by 57Nomad View Post
Just inquiring ... #1 where would one run exhaust as loud as open header if not on the track? But at the track just open the headers up.

#2 Certainly the noise will attract the cops............No?

Stealth might be a more practical game.

# 1 Cause they sound fking great?

# 2 And not in GA cops have no problem with open headers, 20 years running never a ticket
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