Arlen Ness 18-750 Knuckle Stage 1 Big Sucker™, Black tri-fold 3-1/2" bore forged standard compression

3-1/2" bore forged standard compression pistons for 80" (4-1/4" stroke) engines with rings and wristpins

Drag Specialties Part # 0601-5819

Fitment: 99-2017 Twin Cam & 2018 M8 Softails / 16-2023 FLT Touring (Except 2023 CVO Models) & 15-up FLHTCUL/FLHTKL (Except 19-up Softail)

and Dark Black Smoke (25%)  Dark Black Smoke available in 15" height only

of a vintage-era device featuring retro styling and practical function

Arlen Ness 18-750 Knuckle Stage 1 Big Sucker™, Black tri-fold 3-1/2" bore forged standard compressionArlen Ness 18 750 Big Sucker Stage 1 air cleaners are engineered and proven to give your engine maximum airflow for more horsepower & torque. The patented hidden breather backing plate is o ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system, eliminating the need for any external hoses or hardware Knuckle Stage 1 Air Cleaner Cover Increases Horsepower & Torque Patented Hidden Breather Technology Pre