Knuckle Stage 1 Big Sucker™, Black Fitment:88-up XL Sportster NOTE: Electronic Throttle TBW models

NOTE: Electronic Throttle TBW models (08'-16' TOURING / 16'-17' FXDLS / 14'-15' FLSTNSE / 13'-15' FXSBSE / 11'-12' FLSTSE)

including our signature chrome finishes

Clean & compact design

or just want to fill up that space when you're not using it

Made from 7075 T6 Aircraft Grade Aluminum

Knuckle Stage 1 Big Sucker™, Black Fitment:88-up XL Sportster NOTE: Electronic Throttle TBW modelsBig 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 Oiled High