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True Dual Thunder Exhaust System w/Cross Under - 1071

  • Part #:
    4405542
  • Mfg Part #:
    1071
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True Dual Thunder Exhaust System w/Cross Under - 1071

  • Part #:
    4405542
  • Mfg Part #:
    1071
MSRP: $1,713.00

Price: $1375.96 20% off!
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Thunderheader True Dual Thunder Exhaust System w/Cross Under - 1071
  • Increased horsepower, torque and unmistakable Thunderheader sound
  • Individual pipes for each cylinder, featuring a Cross-Under design
  • Balance tube incorporated in between primary tubes for improved torque
  • Furnished with fittings for Oxygen sensors
  • Thunderheader head pipes have been tuned to the proper length and diameter to produce maximum horsepower and an excellent torque curve
  • 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

NOTES:
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 need to be made during, or after, installing their product. If a jet kit or fuel processor is recommended, see our Intake/Fuel section.

Exhaust discoloration (bluing) is caused by engine conditions such as cam timing, fuel-air mixture, operating temperature, etc. It is not the result of defective manufacturing; therefore it is not covered by any warranty. See our Chems/Lubes section for products to help remove or prevent exhaust discoloration

Included Items:
(2) Head pipes
(2) 5/16-18 x 3/4 in. Hex bolts
(6) 5/16 in. Plain washers
(1) 5/16 in. Lock washer
(3) 5/16 in. Nuts
(2) 5/16-18 Lock nuts
(1) Mounting bracket (trans)
(1) 5/16-18 x 1-1/4 in Hex bolt
(1) 1-3/4 in. Clamp
(3) 1-7/8 in. Clamps
(1) 3/8-16 x 1-1/4 in. Carriage bolt
(1) 1-3/4 in. P-Clamp
(1) Cross-Under pipe
(2) 1/4-20 x 1 in. Bolts
(1) 3/8-16 Lock nut
(1) 3/8 in. Plain washer
(1) Rear bracket (trans)
(2) 1/4 in. Lock washers
(2) ThunderCones
(2) ThunderCone heat shields
(1) Left under head shield
(1) Front heat shield
(1) Rear heat shield
(13) Heat shield clamps
(2) 5/16-18 x 1/2 in. Hex bolts
(2) 1/4 in. Plain washers

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 #: 4405542
Mfg #: 1071
Color Chrome
Finish Chrome
Style Straight-Cut Tip
Type 2-Into-2 System
Units Each
Weight 38.60 lbs
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Resources & Manuals
Fitment for Thunderheader True Dual Thunder Exhaust System w/Cross Under - 1071

Part 4405542 fits the following machines

Harley-Davidson
  • Electra Glide Classic - FLHTC 2010-2013
  • Electra Glide Police - FLHTP 2014-2016
  • Electra Glide Ultra Classic - FLHTCU 2010-2016
  • Electra Glide Ultra Classic CVO/SE - FLHTCUSE 5 2010
  • Electra Glide Ultra Classic CVO/SE - FLHTCUSE 6 2011
  • Electra Glide Ultra Classic CVO/SE - FLHTCUSE 7 2012
  • Electra Glide Ultra Classic CVO/SE - FLHTCUSE 8 2013
  • Electra Glide Ultra Classic Low - FLHTCUL 2015-2016
  • Electra Glide Ultra Limited - FLHTK 2010-2016
  • Electra Glide Ultra Limited CVO/SE - FLHTKSE 2014-2016
  • Electra Glide Ultra Limited Low - FLHTKL 2015-2016
  • Road Glide - FLTRX 2015-2016
  • Road Glide Custom - FLTRX 2010-2013
  • Road Glide Custom CVO/SE - FLTRXSE 2012
  • Road Glide Custom CVO/SE - FLTRXSE 2 2013
  • Road Glide Special - FLTRXS 2015-2016
  • Road Glide Ultra - FLTRU 2011-2013, 2016
  • Road Glide Ultra CVO/SE - FLTRUSE 2011, 2015-2016
  • Road King - FLHR 2010-2016
  • Road King Classic - FLHRC 2010-2013
  • Road King CVO/SE - FLHRSE 2014
  • Road King CVO/SE - FLHRSE 5 2013
  • Street Glide - FLHX 2010-2016
  • Street Glide CVO/SE - FLHXSE 2010, 2015-2016
  • Street Glide CVO/SE - FLHXSE 2 2011
  • Street Glide CVO/SE - FLHXSE 3 2012
  • Street Glide Special - FLHXS 2014-2016

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Reviews & Questions
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Browse 6 questions Browse 6 questions and 7 answers
I have a 2014 flhtkse ultra L and I am wondering if this exhaust will fit this bike? Thanks.
Billy on Aug 8, 2016
BEST ANSWER: Yes, these should fit.
Would be nice if they made them for Harley Trikes. Do they?????
A shopper on Mar 31, 2020
BEST ANSWER: Not that we carry
How do the thunder headers to in the to look on the right side?
A shopper on Jun 2, 2019
BEST ANSWER: These work very well
This is not a header/slip on system but two complete header/muffler pipes correct?
Tim W on May 23, 2019
BEST ANSWER: Correct
will this fit my 2018 deluxe.?
mark s on Sep 17, 2018
BEST ANSWER: No
do you have it in black? 1071B
Valentin t on Aug 30, 2016
BEST ANSWER: It unfortunately does not appear as though we carry the Black model 1071B. I'm sorry Valentin.
4.0 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
3
1
0
0
1
Finish
4.4 / 5
Fit
4.5 / 5
Performance
4.0 / 5
Styling
4.5 / 5
Value
4.8 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (4)
Finish
4 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
4 / 5
Value
5 / 5
Would you recommend this product?
Yes
Plan on at least half of the day for installation. Get the V&H fuelpak to go with it and your bike will run like a champ. My bike sounds amazing. You can feel the difference in HP and torque.
August 9, 2018
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
Awesome exhaust!
Once tuned properly, bikes runs and sounds amazing. To the guy that gave a bad review your stealership has no clue!
August 12, 2016
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
Love the sound
Fittment was a little to tight but it’s a awesome exsaust system
January 23, 2018
65240, MO
Purchased
over 2 years ago
Ride:
2015 Roadglide
Finish
4 / 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
Like overall looks and sound
Exhaust system was fairly to install and sounds great
October 11, 2017
Purchased
over 2 years ago
Finish
4 / 5
Performance
1 / 5
Thick twice before using product
After putting on the True dual exhaust the bike now back fires when taking off and is sluggish. I would not recommend. 4 times to dealership and I was told nothing they could do might be wrong pipes.
June 4, 2015
Minneapolis, MN