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Black Thundercone Slip-On Mufflers - 1066B

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Black Thundercone Slip-On Mufflers - 1066B

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MSRP: $657.00

Price: $591.30 10% off!
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Thunderheader Black Thundercone Slip-On Mufflers - 1066B
  • Increased horsepower, torque and unmistakable Thunderheader sound
  • A patented collector is used instead of a conventional baffle in the muffler
  • The Collector is designed to direct spent gases through four acoustical dampening chambers
  • The flow director serves a multi-task function: directs outgoing flow through four acoustical dampening chambers creating a spiral motion upon exiting to atmosphere and it also forms a pyramidal shaped anti-reversion trap to minimize the amount of air rushing in
  • In conjunction with the flow director, a diffuser shroud is built into the reverse cone, this patented device is designed to diffuse the air rushing in as the pressure inside of the system becomes equal to atmosphere

Not all products are legal for sale or use on pollution controlled vehicles. Check your local laws and the manufacturers information

There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Discoloration (bluing) is the result of tuning characteristics, cam timing, carburetor jetting, overheating, etc., and is not caused by defective manufacturing. See the CHEMS/LUBES section for products that will help prevent or remove bluing.

Installation of a new exhaust system may change your motorcycles fuel-air mixture requirements. Please consult the exhaust manufacturer directly with questions regarding any modifications that may need to be made during, or after, installing their product. If a jet kit or fuel processor is recommended, see the FUEL/INTAKE section

The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. Due to these legal restrictions this part cannot be shipped to California.

Included Items:

(2) Black steel slip on mufflers

No instructions

Part #: 4410261
Mfg #: 1066B
Color - Primary Black
Style Tapered Tip
Type Slip-On/Muffler
Units Pair
Weight 13.15 lbs
WARNING: Cancer and Reproductive Harm -
Fitment for Thunderheader Black Thundercone Slip-On Mufflers - 1066B

Part 4410261 fits the following machines

  • Electra Glide Police - FLHTP 2017-2018
  • Electra Glide Standard - FLHT 2019-2020
  • Electra Glide Ultra Classic - FLHTCU 2017-2019
  • Electra Glide Ultra Limited - FLHTK 2017-2020
  • Electra Glide Ultra Limited CVO/SE - FLHTKSE 2017-2020
  • Electra Glide Ultra Limited Low - FLHTKL 2017-2019
  • Road Glide - FLTRX 2017-2020
  • Road Glide CVO/SE - FLTRXSE 2018-2019
  • Road Glide Limited - FLTRK 2020
  • Road Glide Special - FLTRXS 2017-2020
  • Road Glide Ultra - FLTRU 2017-2019
  • Road King - FLHR 2017-2020
  • Road King Special - FLHRXS 2017-2020
  • Street Glide - FLHX 2017-2020
  • Street Glide CVO/SE - FLHXSE 2017-2020
  • Street Glide Special - FLHXS 2017-2020
Reviews & Questions
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Browse 7 questions Browse 7 questions and 7 answers
Will these sound similar to the 2 into 1 Thunderheader ?
A shopper on Dec 4, 2018
Is thunderheader going to make a true dual system for the m8 anytime soon?
A shopper on Sep 27, 2019
BEST ANSWER: I would think so, you would have to contact them with that question
I noticed that the only 2019 touring bike not listed here for fitment is the Road King Special. Was this an omission or is there a fitment issue for that particular bike?
John B on Jun 24, 2019
BEST ANSWER: John I am sorry .
I am not sure about the Road King
Can I use my shields for a 2019 CVO street glide on these pipes?
Cheryl D on Jun 7, 2019
BEST ANSWER: You should be able to use your headpipe shields
Are these ever going to be available with the heat shields for an 18 Road Glide Special again?
Cody B on May 31, 2019
BEST ANSWER: We usually get new stock within 30 days unless you put it on back order which will expedite the process (usually 7-10 days).
Will these slip one fit Harley’s screaming eagle high flow exhaust?
Aalexhd on May 5, 2019
Can I use my shield that came on my bike on these pipes?
A shopper on Apr 5, 2019
BEST ANSWER: I would think so
5.0 / 5.0
1 Review
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Very Quiet
Very Loud
Would you recommend this product?
Yes (1)
4 / 5
5 / 5
Very Quiet
Very Loud
3 / 5
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4 / 5
Would you recommend this product?
Definitely was the sound i was looking for on my 2019 Roadglide Special!!
July 1, 2019
San Diego, CA
6 months ago
2019 Roadglide Special FLTRXS