Arlen Ness Black Monster Air Cleaner Intake Breather Stage 1 Harley 2017-2021 M8

Designer: Arlen Ness

Sold Out
Unit Price
SKU 81-039
Free delivery to the Lower 48 States
30 Day Returns and Exchanges
Fitmet Questions? Call us at 610-754-8500



PART NUMBER - 81-039


2017 - 2020 Harley Milwaukee 8 models

  • Our Monster Sucker 90° air cleaner kit features a massive forward facing filter design and our patented hidden breather backing plate for maximum performance gains
  • Our patented hidden breather technology are o-ringed at the heads and exist out the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware
  • The Monster Sucker filter has more filter surface area then any other 90° kit on the market and features an inverted filter top to pull in air from every direction
  • Each filter is constructed from synthetic material that is water resistant, which in most cases eliminates the need for a rain sock. Filters are washable and do not require oil, just wash and re-use
  • Kits Milwaukee-Eight™ (M8) engine applications include a throttle servo cover for a clean look
  • Monster Sucker kits are available with or without forged billet covers
  • Styled covers CNC machined from forged billet aluminum can be added at any time to any Standard Monster Sucker kits that were originally purchased without a cover
  • Each kit includes gloss black powdercoat backing plate & 90° elbow, synthetic filter, gaskets and necessary hardware (M8 applications include servo cover)