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Black 2-into-1 High Performance Exhaust System - 1026B

  • Part #:
    4407262
  • Mfg Part #:
    1026B
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Black 2-into-1 High Performance Exhaust System - 1026B

  • Part #:
    4407262
  • Mfg Part #:
    1026B
MSRP: $814.00

Price: $732.60 10% off!
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Thunderheader Black 2-into-1 High Performance Exhaust System - 1026B
  • Designed to give maximum horsepower without sacrificing low-end torque
  • 2-into-1 systems with patented collector design that directs spent exhaust gases in a spiral motion through four acoustical damping chambers
  • Exhaust travels through these chambers at high velocity to scavenge spent exhaust gases from the combustion chamber and bring in a fresh charge of air/fuel mixture
  • Anti-reversion design works to impede reverse flow through the system -- reverse flow can contaminate the incoming fuel/air mixture, which reduces performance and throttle response
  • As reverse flow enters the collector, the diffuser deflects it through vents; the pyramidal trap and apertures impede the reverse flow, allowing time for the exhaust valve to close
  • Flow director has equal area at each end, allowing exhaust gases to travel at a constant velocity over the entire length to improve exhaust scavenging
  • For heat shields, order the following: 25-1725, 15 in. long style top front; 25-1724, 23 in. long style top rear; 25-1723, 17 in. collector



Included Items:
(1) Black 2-into-1 head pipe muffler assembly with non removable baffle
(1) Black steel mounting bracket
(1) 5/16 in.-18 x 1 1/2 in. hex head bolt
(4) 5/16 in. flat washers
(3) 5/16 in. lock washers
(3) 5/16 in.-18 nuts
(1) Black steel mounting clamp
(2) 5/16 in.-18 x 1 in. hex head bolts
Instructions

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.

Specifications
Part #: 4407262
Mfg #: 1026B
Color Black
Style Tapered Tip
Type 2-Into-1 System
Units Each
Weight 18.95 lbs
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Resources & Manuals
Fitment for Thunderheader Black 2-into-1 High Performance Exhaust System - 1026B

Part 4407262 fits the following machines

Harley-Davidson
  • Dyna Convertible - FXDS-CONV 1999-2000
  • Dyna Low Rider - FXDL 1999-2005
  • Dyna Low Rider Injected - FXDL I 2004-2005
  • Dyna Super Glide - FXD 1999-2005
  • Dyna Super Glide Custom - FXDC 2005
  • Dyna Super Glide Custom Injected - FXDC I 2005
  • Dyna Super Glide Injected - FXD I 2004-2005
  • Dyna Super Glide Sport - FXDX 1999-2005
  • Dyna Super Glide Sport Injected - FXDX I 2004-2005
  • Dyna Super Glide T-Sport - FXDXT 2001-2003
  • Dyna Wide Glide - FXDWG 1999-2005
  • Dyna Wide Glide Injected - FXDWG I 2004-2005

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Reviews & Questions
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Browse 13 questions Browse 13 questions and 14 answers
Do you ship to California ?
A shopper on Feb 27, 2017
BEST ANSWER: Yes we do ship to California.
Do I need the heat shields on the exhaust?
A shopper on Apr 19, 2017
BEST ANSWER: I didn't order them now my pants all have holes lol. Order the heat shields.
Do you make a black thunder header for 2018 streetglide..?
A shopper on May 10, 2020
BEST ANSWER: https://www.denniskirk.com/thunderheader/black-x-series-exhaust-system-1073xb.p4409870.prd/4409870.sku
Do you ship to Spain?
Jisas on Apr 13, 2020
BEST ANSWER: To find shipping charges, you may place your order online at www.denniskirk.com Once you have entered your shipping address, you will see your shipping options along with the charges before you complete your order. Or you can call our sales staff (800-969-7501) and they can let you know the shipping charges
Do you ship to Spain? The exhaust fits in my 2005 dyna super glide sport FXDX but I need to know about the shipping.
Jisas on Apr 13, 2020
BEST ANSWER: To find shipping charges, you may place your order online at www.denniskirk.com Once you have entered your shipping address, you will see your shipping options along with the charges before you complete your order. Or you can call our sales staff (800-969-7501) and they can let you know the shipping charges
I have a 2014 Harley Davidson Dyna street Bob. Will l be able to mount mid controls with this 2 in1thunder header exhaust?
Peter R on Dec 14, 2019
BEST ANSWER: Not for your year, see fitment tab for correct fits
will you ship to California?
A shopper on Aug 29, 2019
BEST ANSWER: 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.
Hi guys, just enquiring at this stage since I don’t have the money. But would you ship to New Zealand? Ad if so for what added cost? Nobody here sells the exhaust I want.
Sean M on Mar 1, 2019
BEST ANSWER: To find shipping charges, you may place your order online at www.denniskirk.com Once you have entered your shipping address, you will see your shipping options along with the charges before you complete your order. Or you can call our sales staff (800-969-7501) and they can let you know the shipping charges
Will this fit an 03 dyna low rider with forward controls?
Travis S on Oct 11, 2018
BEST ANSWER: Yes
Does this fit a Harley Davidson 2018 FLHCS 114?
Duffer on Oct 2, 2018
BEST ANSWER: I dont know. I put it on my 2000 FXDX.
Good Luck.
Do you ship to new Zealand?
A shopper on Jun 23, 2018
BEST ANSWER: To find shipping charges, you may place your order online at www.denniskirk.com Once you have entered your shipping address, you will see your shipping options along with the charges before you complete your order. Or you can call our sales staff (800-969-7501) and they can let you know the shipping charges
Does this come with all required mounting hardware?
Ben S on Mar 6, 2017
BEST ANSWER: yes
Do you offer a matching Ghost pipe?
A shopper on Sep 6, 2016
BEST ANSWER: I am unaware contact our Tech Support for further information. 800-969-7501
4.4 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
5
1
0
1
0
Finish
3.8 / 5
Fit
4.3 / 5
Performance
5.0 / 5
Styling
4.8 / 5
Value
3.8 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (6)
Finish
1 / 5
Fit
2 / 5
Performance
5 / 5
Styling
5 / 5
Value
2 / 5
Would you recommend this product?
Yes
Not what I expected
I bought this system for my FXDX. Got the kit. First thing I noticed is the crappy weld for the pipes that go to the heads. Looks like a rookie welded it. Might porcupines from the wires sticking up and not smoothed out. A Drexel would've gone far. Next, the welds for the 2 into 1 look craptastic like a newbie welded it. The cone section was a little better but not by much. The finish sucked plain ole sucked. It is supposedly a ceramic based paint but oxidation was prevalent. Not good esp for the cost. The sound and performance is where it is at on the Thunderheader. Fit and finish was way off tho. A can of 2000 degree Krylon was used as well as a air grinder to make this road worthy. I got with Thunderheader and no-one even bothered to call me back after 3 attempts.
March 14, 2017
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
4 / 5
Value
2 / 5
Would you recommend this product?
Yes
Shipping was pretty quick, install was pretty simple, the sound is awesome, purrs like a kitten at idle and roars like a lion when you hit the gas, definitely made a difference in performance, only reason for a four star rating is because a plain black pipe cost more than a chrome dipped pipe
May 16, 2018
Purchased
over 2 years ago
Awesome
Great performance, even better sound. Installation was not to difficult. Love the low end torque.
March 5, 2016
Fort Carson, CO
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Very happy!!
Shipped in time!! Fit as expected!! Great service!! What more can I ask for?
May 5, 2017
Purchased
over 3 years ago
Finish
5 / 5
Fit
5 / 5
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
The best
User submitted image
Added Aug 23, 2018
August 23, 2018
Purchased
over 2 years ago
Finish
2 / 5
Fit
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
4 / 5
Would you recommend this product?
Yes
8 out of 10
Great power, easy install, amazing look. Terrible powder coat job. If you look at it, it scratches.
User submitted image
Added Sep 16, 2019
September 16, 2019
Rochester , NY
Purchased
11 months ago
Ride:
2001 dyna lowrider
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Runs great, sounds great, install instructions were perfect. Couldn't be happier.
March 3, 2019
San Antonio, TX
Purchased
1 year ago
Ride:
2005 FXDi