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Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394
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Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394

  • Part #:
    1800091
  • Manufacturer Part #:
    18-394
Our Price: $249.99
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Overview of Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394
  • The new Big Sucker™ Stage 1 performance intake for Milwaukee-Eight™ engines adds new and improved features to the original industry-leading air cleaner
  • New patent-pending hidden breather backing plate technology is a step up from our original patented system
  • Each breather is O-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through proprietary breather tubes
  • Our breathing system eliminates oil issues associated with M-Eight engines by directing any excess breather oil back into the engine
  • To ensure no oil saturates the filter and restricts your airflow, we also integrated a new patent-pending oil reservoir that can be serviced when you service the filter element
  • Smooth radius air inlet for unobstructed air flow
  • New Brass filter top plate has integrated filter mounting studs for increased durability while eliminating the need for additional filter mounting hardware
  • High performance filters are made from black pre-oiled cotton for the best in airflow and filtration
  • Filter is washable and re-usable
  • Each M-Eight Big Sucker™ Stage I kit includes one-piece backing plate, breather tubes, performance filter, filter top, gaskets, oil reservoir and necessary hardware


Included Items:

(1) Air filter

(1) Black aluminum big sucker backing plate

(1) Aluminum filter top plate

(1) Carbon fiber top cover

(2) 8mm Breather bolts

(1) Throttle body gasket

(2) White nylon spacers

(4) O-Rings

(2) Oil vent tubes

(3) 1/4"-20 x 3/4" Socket cap head bolts

(2) 1/4"-20 x 1-1/2" Socket cap head bolts

(2) #8-32 x 3/4" Socket cap head bolts

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

(1) Oil reservoir

(1) Oil reservoir gasket

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 Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394

Type Air Filter - OEM Type
Units Each
Weight 2.50 lbs
Specs for Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394
Type Air Filter - OEM Type
Units Each
Weight 2.50 lbs
Fitment for Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394

Part 1800091 fits the following machines

Make Sure This Fits Your Ride
Harley-Davidson
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  • 2018 Harley-Davidson Street Glide - FLHX
  • 2017 Harley-Davidson Street Glide - FLHX
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  • 2018 Harley-Davidson Street Glide CVO/SE - FLHXSE
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  • 2019 Harley-Davidson Street Glide Special - FLHXS
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  • 2018 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
  • 2017 Harley-Davidson Tri Glide Ultra Classic - FLHTCUTG
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What is the diameter?
A shopper on Jan 13, 2019
BEST ANSWER: 6"
Instructions and Manuals for Arlen Ness Black Big Sucker Stage 1 Knuckle Air Filter Kit w/Standard Air Filter & Billet Cover - 18-394
Instruction Manual Instruction Manual PDF 983.0 KiB