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Chrome Long Style High-Performance 2-Into-1 Exhaust System with Heat Shields - 1074S

  • Part #:
    4408743
  • Mfg Part #:
    1074S
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Chrome Long Style High-Performance 2-Into-1 Exhaust System with Heat Shields - 1074S

  • Part #:
    4408743
  • Mfg Part #:
    1074S
MSRP: $1,165.00

Price: $1048.50 10% off!
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Thunderheader Chrome Long Style High-Performance 2-Into-1 Exhaust System with Heat Shields - 1074S
  • 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
  • Includes a set of full-coverage heat shields


Included Items:

(1) Chrome head pipe assembly with heat shields

(1) Chrome heat shield

(1) Chrome muffler assembly

(1) Black steel mounting bracket

(1) Chrome steel 1-3/4" Pinch clamp

(1) 2-5/8" Chrome exhaust clamp

(1) Chrome hose clamp # 56

(2) Chrome hose clamps # 40

(6) Chrome hose clamps # 24

(1) 5/16"-18 x 1-1/2" Hex head bolt

(2) 5/16"-18 x 1" Hex head bolt

(6) 5/16" Flat washers

(1) 5/16" Split lock washer

(1) 5/16"-18 Hex nut

(2) 5/16"-18 Nylock nuts

(1) Black round aluminium spacer

(1) Black steel spacer

(1) 3/8"-16 x 3" Socket cap head bolt

(2) 3/8"-16 x 1-3/4" Socket cap head bolts

Instructions

 

 

 

  



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 #: 4408743
Mfg #: 1074S
Color Chrome
Style Straight-Cut Tip
Type 2-Into-1 System
Units Each
Weight 25.30 lbs
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Resources & Manuals
Fitment for Thunderheader Chrome Long Style High-Performance 2-Into-1 Exhaust System with Heat Shields - 1074S

Part 4408743 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 2016
  • Electra Glide Ultra Limited - FLHTK 2010-2016
  • Electra Glide Ultra Limited CVO/SE - FLHTKSE 2014-2016
  • Electra Glide Ultra Limited Low - FLHTKL 2016
  • Road Glide Custom - FLTRX 2010-2013
  • Road Glide Custom CVO/SE - FLTRXSE 2012
  • Road Glide Custom CVO/SE - FLTRXSE 2 2013
  • 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 2 questions Browse 2 questions and 3 answers
how long is shipping?
A shopper on Dec 12, 2016
BEST ANSWER: I received it within the week Enter an answer to this question.
What size O2 ports does this system have?
Anthony D on Oct 11, 2016
BEST ANSWER: 12 mm
4.6 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
5
1
1
0
0
Finish
4.6 / 5
Fit
4.6 / 5
Performance
5.0 / 5
Styling
4.4 / 5
Value
4.1 / 5
Loudness
Very Quiet
Average
Very Loud
Would you recommend this product?
Yes (7)
Finish
5 / 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
Over 10 H.P. to the rear wheel.....
Awesome sounding exhaust and performance.. Combine it with the Stage 1 Big Sucker intake, TTS Mastertune and 254E Cams and you have a beast pushing over 108 Rear Wheel Horse Power.. It was the final piece of the puzzle.. I had everything already on the Bike with a different brand exhaust... I changed out the exhaust to Thunderhead and it gained me a lil over 10 H.P. Enough Said
April 19, 2018
Purchased
over 2 years ago
Finish
4 / 5
Fit
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
4 / 5
Value
4 / 5
Would you recommend this product?
Yes
Best sounding header on the market.
May 22, 2020
ocklawaha, FL
Purchased
3 months ago
Ride:
United States
Finish
5 / 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
THUNDERHEADER
Love this pipe. At least 10% increase in performance which feels like alot. Best sounding rumble of any pipe I've heard.
May 11, 2020
Pequea, PA
Purchased
3 months ago
Ride:
2015 Street Glide Special.
Finish
5 / 5
Fit
5 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
5 / 5
Value
3 / 5
Would you recommend this product?
Yes
Fifth harley - Fourth Thunderheader
Still the best performance upgrade I've made to my motorsickles.
May 11, 2020
Purchased
3 months ago
Finish
4 / 5
Fit
4 / 5
Loudness
Very Quiet
Average
Very Loud
Performance
5 / 5
Styling
4 / 5
Value
3 / 5
Would you recommend this product?
Yes
Overall a good exhaust but beware
Final cone arrived with surface rust on the chrome and floorboard spacer was misdrilled which causes fastener to cross thread
May 9, 2020
Guntown, MS
Purchased
3 months ago
Ride:
2012 Flhx
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
Performance Pipe
Great Sound, Great Fit, Easy Install
October 4, 2017
Purchased
over 2 years ago
Finish
4 / 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
Nice pipe really good sound
October 11, 2016
Purchased
over 4 years ago