Big Sucker™ Stage I Air Filter Kit delivers improved throttle response and increases horsepower and torque. ⚡
One-piece aluminum backing plate includes hidden breather technology; each breather 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 external hoses or hardware.
The radius air inlet provides unobstructed airflow for maximum performance.
The pre-oiled, washable and reusable high-performance filter uses four layers of premium cotton and is handmade in the USA; all necessary hardware and instructions are included.
Fits '01-'17 Twin Cam Delphi EFI and '99-'06 Twin Cam CV carb models.