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Thunderheader Black X-Series Exhaust System - 1073XB

  • Part #:
    4409870
  • Manufacturer Part #:
    1073XB

MSRP Price: $1,364.00

Our Price: $1,227.60

You Save:
$136.40 (10%)
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Overview of Thunderheader Black X-Series Exhaust System - 1073XB

  • Thunderheader™ X-Series™ 2-into 1 exhaust systems for Touring models is our large diameter exhaust specifically designed for big cubic inch engines, built to produce big numbers
  • The X-Series™ is designed with 2 in. primary tubes with a 12-degree transition chamber to allow more exhaust flow
  • Unique patented baffle in conjunction with the trademark tail cone is designed to allow a free-flowing exhaust while creating an anti-reversion condition in the pipe which will aid the air/fuel flow on the intake stroke to allow more fuel into the combustion chamber
  • This means more torque at the low and mid RPM ranges and maximum horsepower at top end
  • Complete with heat shields and all mounting hardware, and 12mm O2 sensor bungs
  • O2 sensor ports are pre-installed with O2 sensor plugs

 



Included Items:

(1) Chrome steel 2 into 1 header assembly W/black steel heat shields installed

(1) Black steel muffler assembly

(1) Black steel muffler heat shield

(11) Small black hose clamps

(2) Large black hose clamps

(1) Band clamp

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

(3) 5/16" Flat washers

(1) 5/16"-18 x 3/4" Hex head bolt

(1) 5/16"-18 Nylock nut

(1) 5/16"-18 Hex nut

(1) Black steel mounting bracket

(1) Black steel square spacer

(2) Black aluminum round spacers

(1) 3/8"-16 s 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.

Specs for Thunderheader Black X-Series Exhaust System - 1073XB

Color - Primary Black
Style Tapered Tip
Type 2-Into-1 System
Units Each
Weight 31.25 lbs

Specs for Thunderheader Black X-Series Exhaust System - 1073XB

Color - Primary Black
Style Tapered Tip
Type 2-Into-1 System
Units Each
Weight 31.25 lbs

Fitment for Thunderheader Black X-Series Exhaust System - 1073XB

See if this part fits your ride

Part 4409870 fits the following machines

Harley-Davidson
  • 2018 Harley-Davidson Electra Glide Ultra Classic - FLHTCU
  • 2017 Harley-Davidson Electra Glide Ultra Classic - FLHTCU
  • 2018 Harley-Davidson Electra Glide Ultra Limited - FLHTK
  • 2017 Harley-Davidson Electra Glide Ultra Limited - FLHTK
  • 2018 Harley-Davidson Electra Glide Ultra Limited Low - FLHTKL
  • 2017 Harley-Davidson Electra Glide Ultra Limited Low - FLHTKL
  • 2018 Harley-Davidson Road Glide - FLTRX
  • 2017 Harley-Davidson Road Glide - FLTRX
  • 2018 Harley-Davidson Road Glide Special - FLTRXS
  • 2017 Harley-Davidson Road Glide Special - FLTRXS
  • 2018 Harley-Davidson Road Glide Ultra - FLTRU
  • 2017 Harley-Davidson Road Glide Ultra - FLTRU
  • 2018 Harley-Davidson Road King - FLHR
  • 2017 Harley-Davidson Road King - FLHR
  • 2018 Harley-Davidson Road King Special - FLHRXS
  • 2017 Harley-Davidson Road King Special - FLHRXS
  • 2018 Harley-Davidson Street Glide - FLHX
  • 2017 Harley-Davidson Street Glide - FLHX
  • 2018 Harley-Davidson Street Glide Special - FLHXS
  • 2017 Harley-Davidson Street Glide Special - FLHXS
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Browse 2 questions Browse 2 questions and 2 answers
Just bought a 2018 FLHXS wanted to put a Thunderheader on it but it would "VOID" my warranty.THAT SUCKS!!!??
A shopper on Sep 3, 2017
BEST ANSWER: I know, it's an EPA thing
Is this unit crome with black heat shields?
A shopper on Aug 5, 2017
BEST ANSWER: Yes

Instructions and Manuals for Thunderheader Black X-Series Exhaust System - 1073XB

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