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Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

  • Part #:
    4407265
  • Manufacturer Part #:
    1035B

MSRP Price: $798.00

Our Price: $718.20

You Save:
$79.80 (10%)
10+ on Hand

Overview of Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

  • 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 dampening 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:
    14 in. Top Front - 25-1725
    23 in. Top Rear: 25-1724
    13-1/2 in. Collector - 25-1723



For the best performance, A free-flowing air cleaner and adjustable fuel management system is recommended with this pipe.

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 1/4 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 3/4 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.

Specs for Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

Color - Primary Black
Style Tapered Tip
Type 2-Into-1 System
Units Each
Weight 22.10 lbs

Specs for Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

Color - Primary Black
Style Tapered Tip
Type 2-Into-1 System
Units Each
Weight 22.10 lbs

Fitment for Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

See if this part fits your ride

Part 4407265 fits the following machines

Harley-Davidson
  • 2017 Harley-Davidson Dyna Fat Bob - FXDF
  • 2016 Harley-Davidson Dyna Fat Bob - FXDF
  • 2015 Harley-Davidson Dyna Fat Bob - FXDF
  • 2014 Harley-Davidson Dyna Fat Bob - FXDF
  • 2013 Harley-Davidson Dyna Fat Bob - FXDF
  • 2012 Harley-Davidson Dyna Fat Bob - FXDF
  • 2017 Harley-Davidson Dyna Low Rider - FXDL
  • 2016 Harley-Davidson Dyna Low Rider - FXDL
  • 2015 Harley-Davidson Dyna Low Rider - FXDL
  • 2014 Harley-Davidson Dyna Low Rider - FXDL
  • 2016 Harley-Davidson Dyna Street Bob - FXDB
  • 2015 Harley-Davidson Dyna Street Bob - FXDB
  • 2014 Harley-Davidson Dyna Street Bob - FXDB
  • 2013 Harley-Davidson Dyna Street Bob - FXDB
  • 2012 Harley-Davidson Dyna Street Bob - FXDB
  • 2014 Harley-Davidson Dyna Super Glide Custom - FXDC
  • 2013 Harley-Davidson Dyna Super Glide Custom - FXDC
  • 2012 Harley-Davidson Dyna Super Glide Custom - FXDC
  • 2017 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2016 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2015 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2014 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2013 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2012 Harley-Davidson Dyna Wide Glide - FXDWG
  • 2017 Harley-Davidson Low Rider S - FXDLS
  • 2016 Harley-Davidson Low Rider S - FXDLS
4.7 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
4
2
0
0
0
Finish
4.5 / 5
Fit
4.2 / 5
Performance
4.8 / 5
Styling
4.8 / 5
Value
4.6 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (5)
Finish
5 / 5
Fit
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
5 / 5
Would you recommend this product?
Yes
Outstanding!
I can't tell you how satisfied I am with my new thunderhead pipes. Dennis Kirk was extremely quick with delivery and very courteous. I would recommend them to anyone. I also requested a catalog and it was here in two days. Keep up the great work. Wish more companies had there work ethic.
Going to add heat wrap to pipes and got new bars to put on.
Going to add heat wrap to pipes and got new bars to put on.
October 23, 2016
Purchased
1 year ago
Finish
5 / 5
Performance
5 / 5
Thunderheader
If you want a Thunderheader buy it here, best price, fast delivery. Dennis Kirk had these in stock when every one else was talking a 4 to 6 week wait or even longer. I had mine in about 4 days!! Sounds awesome, looks awesome, performance increase is pretty amazing. Not too loud, nice low rumble at idle, barks when you open it up. Go on, buy one you won't regret it, especially if you buy it here.......
July 7, 2015
Purchased
over 2 years ago
Finish
3 / 5
Fit
3 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
4 / 5
Would you recommend this product?
Yes
Love my thunderheader, more power, more style and very loud
User submitted image
Added Nov 2, 2016
November 2, 2016
Purchased
1 year ago
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
It's a Thunderheader. Nothing beats this exhaust imo. My second choice would be a RR3.
July 6, 2017
Purchased
9 months ago
Finish
5 / 5
Fit
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
4 / 5
Styling
4 / 5
Value
4 / 5
Would you recommend this product?
Yes
Ordered it on a Monday evening received it Tuesday, excellent
November 1, 2016
Purchased
1 year ago
Finish
4 / 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
2012-2017 dyna Thunder header
Best sounding exhaust on the market in my opinion the black coating on this pipe looks good for about a month then it fades that's why I didn't give.m a 5 star review
2015 dyna low rider 1035b Thunder header
2015 dyna low rider 1035b Thunder header
September 16, 2016
Purchased
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 12 questions Browse 12 questions and 28 answers
It says it won't fit a 2017 Dyna Street bob why not?
Bear strength on May 24, 2017
BEST ANSWER: I don't see why it wouldn't my buddy has a 2017 fxdls and 1035B THUNDERHEADER fit on his bikeyour best bet is to call thunderheader dealer themselves and ask thats what we did for my buddys 2017 fxdls with a 110 se motor!
Will the thunderheader exhaust fit with forward controls?
A shopper on Feb 20, 2017
BEST ANSWER: Yes it will
do I need a fuel tuner for this system or can I just bolt it on and run? my 2014 fxdb is completely stock
chris on Jul 6, 2017
BEST ANSWER: Yes you should run a tuner to get the full benefit of the pipe. But you could just put the pipe on. I did the thunder header and a k&n intake with a vance and hines fuelpac it was like a whole new bike. I would recommend buying the heat shields or using exhaust wrap
Does this exhaust fit a 2016 Dyna Low Rider with mid controls?
Joe B on Jan 29, 2017
BEST ANSWER: I'm running this on my 2014 Low Rider with maids.
Great pipe - put ALL the heat shield on before installing and read directions and it's easy install
Will this fit a 16 street bob with mid controls?
A shopper on Sep 16, 2016
BEST ANSWER: Absolutely! This exhaust will fit, however fitment on this particular exhaust may be a pain to get on. Not as precise an install as other brands, but the performance is well worth it!
Will this fit the Dyna Lowrider S model?
A shopper on Oct 3, 2016
BEST ANSWER: It got my 2016 FXDLS perfect.
2017 dyna low rider s does the pups have the smog holes for california..??
A shopper on Oct 8, 2016
BEST ANSWER: Yes it has the 02 sensors and fits your 2016 low rider s they do not ship to California though I had to have mine shipped to a family member out of state and then to me
Are O2 sensor holes present on this model? Need one with O2 sensor holes...Thx
A shopper on Oct 18, 2017
BEST ANSWER: Yes
Where is the part number located on the Thunderheader? All I found was 151333
Twitch on Oct 9, 2017
BEST ANSWER: Don't know if there is one on it
Part # for 2003 xlh?
A shopper on Feb 25, 2017
BEST ANSWER: I'm sorry we don't carry that brand for your machine
Can you ship to california if used for off course racing and waiver signed?
A shopper on Oct 9, 2016
BEST ANSWER: I am unable to properly locate the answer to your question, please contact our Customer Support for more accurate information 1-800-969-7501
Shipping to the UK how much?
cooky on Oct 3, 2016
BEST ANSWER: I am unable to properly locate the answer to your question, please contact our Customer Support for more accurate information 1-800-969-7501

Instructions and Manuals for Thunderheader Black 2 into 1 High Performance Exhaust System - 1035B

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