Arlen Ness 18-754 Big Sucker Stage 1 Air Filter Kit with Knuckle Cover

The Arlen Ness 18-754 Big Sucker Stage 1 Air Filter Kit transforms your motorcycle's performance with a high-flow air intake system designed to maximize airflow and enhance throttle response. This complete kit features a distinctive black knuckle-style billet steel outer cover that delivers both aggressive styling and serious performance gains.

Advanced Engineering Features:

• One-piece aluminum backing plate with integrated carburetor support bracket for superior strength and stability
• Patented hidden breather technology routes crankcase vapors efficiently without external hoses
• Radius air inlet provides unobstructed airflow for maximum performance
• Breather passages exit at the mouth of the carburetor/throttle body, creating a virtually closed-loop system
• Pre-oiled standard high-performance air filter that is washable and reusable

Complete Kit Includes:

• High-performance pre-oiled air filter element
• One-piece aluminum backing plate with carb support bracket
• Black knuckle-style billet steel outer cover
• All necessary mounting hardware and detailed installation instructions

This Stage 1 air filter system is designed to work with stock fuel systems and significantly outflows factory air cleaners, resulting in noticeable improvements in low-end torque and top-end power. The knuckle design adds a custom, aggressive appearance while the hidden breather system keeps your engine bay clean and streamlined. Professional tuning is recommended after installation to optimize performance gains.