Big Sucker™ Stage I Air Filter Kit — Smooth - Big Sucker™ Stage I Air Filter Kit - Chrome [1010-1601]

For '01-'17 Twin Cam Delphi EFI and '99-'06 Twin Cam CV carb models.

• One-Piece aluminum backing plate with hidden breather technology
• Each hidden 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 any external hoses or hardware
• Radius air inlet provides maximum performance by providing unobstructed airflow
• All necessary hardware and instructions are included
• Pre-Oiled high performance filter is washable and reusable
• Performance filter is made from 4 layers of surgical grade cotton
• Increases horsepower and torque
• Performance filter is handmade in the USA