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America's Oldest Speed Shop ® 800.979.0122 Lincoln, NE
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800.979.0122

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Since 1952
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Speedway Auger Style Muffler

SAME DAY SHIPPING! Most orders ship within 24 hours.

Specs
Material Type:
Steel
Sold in Quantity:
Each
Finish:
Natural
Garage Sale:
No
Overall Length:
11.00
Inside Diameter:
.83
Outside Diameter:
-
Speedway Auger Style Muffler
Speedway Auger Style Muffler
Speedway Auger Style Muffler

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Details

Reviews

Q & A

What's in the Box

Auger style muffler fits 3" or 3-1/2" diameter pipe.  11" long. Baffle style. Slips inside.

Customer Reviews

Rated 4.8 out of 5 by 24 reviewers.
RATING BREAKDOWN
24 reviews
5 Stars
20
4 Stars
3
3 Stars
1
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Randy
Verified Purchaser
Verified Reviewer
Youngstown,Ohio

this is the best insert muffler,very pleased

June 19, 2015
I used these on my T-Bucket,they fit in my headers perfect.The sound was way better than I expected! Just be careful,they have sharp edges,and if you work with metal you know this. Great product!
Yes, I recommend this product.
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Rat69
Verified Purchaser
Yucca Valley, CA, USA

This product is a excellent choice!

March 22, 2015
Once again speedway comes through with the exact part I was needing to finish my exhaust!
Pros:
  • Well built
Yes, I recommend this product.
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Rat69
Verified Purchaser
Yucca Valley, CA, USA

This product is a excellent choice!

March 22, 2015
Once again speedway comes through with the exact part I was needing to finish my exhaust!
Pros:
  • Well built
Yes, I recommend this product.
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Chrhino
Verified Purchaser
Lancaster, PA, USA

Great value

October 19, 2014
Have very loud big block vette with Hooker headers and sidepipes. Installed Classic Chambered fiberglass wrapped mufflers. Way too loud and a loud drone noise. Purchased a pair of 3" auger inserts. Trimmed to fit inside header end of mufflers. Did sound testing with my cellphone app before and after augers. Interior drone noise decreased considerably. Inside and outside decibels with the windows open and closed dropped about 5db + or - 2db. Am considering another auger in opposite end of muffler. The design of the auger does not reduce the exhaust air flow enough to notice performance issues. Chuck
Pros:
  • reduced decibels and drone noise
Cons:
  • had to trim auger to 2-1/2" to fit muffler i.d.
Yes, I recommend this product.
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smoothoperator
Verified Purchaser
Sonora, CA 95370, USA

Great product

August 25, 2014
This is the perfect muffler in my opinion! They slip right in the extensions and no welding or grinding was needed and they sound awesome. I would recommend these mufflers to anyone wanting the look of straight headers without the noise. They aren't too load but they aren't quiet either.
Pros:
  • Perfect Fit
  • very easy install
  • sound awesome
Yes, I recommend this product.
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1924
Verified Purchaser
NORTHERN WIS

VERY GOOD DOES THE JOB

August 24, 2014
TONE DOWN MY CHEVY V 6 WITH 3.5 INCH STRAIGHT PIPES , TOOK THE EAR RINGING EDGE OFF AND DID NOT LOOSE ANY PERFORMANCE/ NICE SOUND AND EASY ON THE THE EARS WHEN I DRIVE THROUGH TOWN, LIKE THEM A LOT MORE THAN A GLASS PACK AND PRICE IS RITE.
Pros:
  • easy install fits snug i welded on some bolt on ta
Cons:
  • None
Yes, I recommend this product.
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1924
Verified Purchaser
NORTHERN WIS

VERY GOOD DOES THE JOB

August 24, 2014
TONE DOWN MY CHEVY V 6 WITH 3.5 INCH STRAIGHT PIPES , TOOK THE EAR RINGING EDGE OFF AND DID NOT LOOSE ANY PERFORMANCE/ NICE SOUND AND EASY ON THE THE EARS WHEN I DRIVE THROUGH TOWN, LIKE THEM A LOT MORE THAN A GLASS PACK AND PRICE IS RITE.
Pros:
  • easy install fits snug i welded on some bolt on ta
Cons:
  • None
Yes, I recommend this product.
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1972NOVAPROSTREET
Verified Purchaser
El Cajon, CA, USA

They worked better than I thought they w

July 26, 2014
The only problem I had was getting a piece of 3 inch exhaust tube for them to fit in for extended collectors. The sound is good and just quite enough for the street. Even quieter than the 3 inch mufflers I had on it.
Yes, I recommend this product.
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Jamister1
Verified Purchaser

Nice!

July 07, 2014
I have a 350 that someone installed a clean 3" single exit exhaust on. Only muffler used was a 36" glass pack which was loud and annoying with no back pressure. I cut the exhaust right in front of the glass pack and pushed the auger upstream. Had to do some grinding to fit it correctly and then I tacked it into place. Welded everything up and it sounds great. Surprisingly quiet but will still rumble when you get on it. Back pressure is restored which makes the driving experience much better. Couldn't beat it for the price and it isn't big and taking up under carriage space like adding a muffler. Love it!
Yes, I recommend this product.
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Camaroholic
Verified Purchaser
north Idaho

Inexpensive and great sound

May 25, 2014
Great inexpensive way to quiet the beast. Had to do a little grinding to get it to fit in the pipe but they sound great on a big block with 3" exhaust.
Pros:
  • Inexpensive
  • Good Quality
  • Great Sound
Cons:
  • didn't fit out of the box
Yes, I recommend this product.
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Page 1 of 3

Product Q&A

9 questions : 13 answers

1 answers

are these legal to use in California? are these mufflers legal to use in California? I have a t bucket with side pipes and want to be legal noise wise so cops don't ticket me for noise. Running a stock 289 small block Ford engine with headers.

Mike289
California, USA
September 17, 2014

are these legal to use in California? are these mufflers legal to use in California? I have a t bucket with side pipes and want to be legal noise wise so cops don't ticket me for noise. Running a stock 289 small block Ford engine with headers.

Answers

September 17, 2014
EricM
No these are not intended for street applications. This is a racing muffler and will provide very little noise reduction.
1 answers

Can 2 of these auger style mufflers be used inline? Can 2 of these auger style mufflers be used in 1 pipe to further reduce the volume?

v8triker
Tampa,Fl
September 10, 2014

Can 2 of these auger style mufflers be used inline? Can 2 of these auger style mufflers be used in 1 pipe to further reduce the volume?

Answers

September 10, 2014
EricM
Yes you can put two of these together to use in one pipe.
2 answers

will this muffler fit in the lake style headers? They seem a little long for this application #9300550H. I'm sure i'll have to grind on the spirals some to make fit but if they're too long Can they be cut down and made shorter and still be affective? Thank you, Frank

limo44
Gap, PA, USA
July 23, 2014

will this muffler fit in the lake style headers? They seem a little long for this application #9300550H. I'm sure i'll have to grind on the spirals some to make fit but if they're too long Can they be cut down and made shorter and still be affective? Thank you, Frank

Answers

March 23, 2015
Rat69
I just installed these in a set of 4" lake headers and they fit perfectly!
July 23, 2014
EricM
Yes you can modify this to fit into a lake style header but don't expect too much of a muffling effect. These will only be a minor difference from open headers.
1 answers

Diameter I have chrome extensions that are 3.375" inside diameter. Will the 3.5" fit inside or do I have to trim it to fit? Also, what is the diameter of the inside pipe?

Mcdn
February 16, 2014

Diameter I have chrome extensions that are 3.375" inside diameter. Will the 3.5" fit inside or do I have to trim it to fit? Also, what is the diameter of the inside pipe?

Answers

February 17, 2014
EricM
Exhaust tubing is always measured by the outside diameter. This auger muffler in a 3.5" version will measure 3.23" on the outside of the augers and has .83" inside diameter on the center pipe. The 3.5 version will work fine for you.
2 answers

I need more decibel reduction from an insert. do you have anything that will help?

gears
melbourne Fl
May 22, 2011

I need more decibel reduction from an insert. do you have anything that will help?

Answers

September 30, 2013
Original426Hemi
Pack with automotive grade (stainless) steel wool!
May 23, 2011
Jason
The Dynatech insert cone would be the best option we have. 31177232520 for 3" or 31177232510 for 3-1/2"
2 answers

how do these mufflers effect performance compared to a hot dog muffler

fossil
April 19, 2011

how do these mufflers effect performance compared to a hot dog muffler

Answers

December 25, 2013
RPM1998
They seem alot less restrictive. We made minimal tune changes when going from open exhaust to the Auger inserts.
April 22, 2011
Eric
I would assume you are referring to a glass pack muffler. These auger mufflers will give equal or a little better performance compared to a glass pack type muffler but the auger will be much louder. We typically use these in racing applications where the rules state you must have a muffler but there are no decibel requirements.
2 answers

Can these mufflers be used for a street rod application, even if I used two in succession on both side of car? Do they need to be welded?

brian patrick
yorktown heights, NY
January 12, 2011

Can these mufflers be used for a street rod application, even if I used two in succession on both side of car? Do they need to be welded?

Answers

January 20, 2011
Waymon
You could use these on a street rod. They won’t be very quiet, however if you aren’t using any other mufflers. The Speedway Auger Style Muffler, part number: 91013984, was developed to allow drivers to pass a muffler rule that some classes require. The decibel reduction they provide is minimal. They need a through bolt or welding to keep them in place.
January 25, 2011
Mr Arm
I have them in my street rod truck. I would definitly say weld them in. They might rattle otherwise. You only need to tack weld them in like two spots for them to stay in place.
1 answers

Hi, I don't have a welder. How do I secure it? Thanks

SSXT
April 16, 2015

Hi, I don't have a welder. How do I secure it? Thanks

Answers

April 16, 2015
Eric
Expert
The best and easiest method is to weld it in place. It is possible drill a hole through the exhaust pipe as well as a corresponding hole through the center tube of this auger muffler and bolt it in place. The issue with this is you may have an exhaust leak around the bolt if not sealed up with high temp silicone.
1 answers

is there much back pressure created from these augers ? don't want too lose much power . Dirt track car with 3" straight exhaust is very loud ,would like to tone sound down so i can hear engine noise when ideling.

glove6788@gmail.com
calhoun,ky
June 20, 2015

is there much back pressure created from these augers ? don't want too lose much power . Dirt track car with 3" straight exhaust is very loud ,would like to tone sound down so i can hear engine noise when ideling.

Answers

June 22, 2015
Eric
Expert
These do not produce a large amount of back pressure but obviously they will create some.
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