Arlen Ness 18-329 High-Flow Air Filter Kit for Harley Sportster

The Arlen Ness 18-329 high-performance air filter kit combines aggressive styling with increased airflow for Harley-Davidson Sportster models. This complete system features an exposed air filter element with a distinctive outer cover that delivers both eye-catching appearance and improved engine breathing.

Key Features:

• One-piece aluminum backing plate with integrated carburetor/throttle body support bracket
• Eliminates bulky banjo fittings, hoses, and clamps for a clean installation
• Integrated breather passages exit directly at the carburetor/throttle body mouth, creating a virtually closed-loop system
• Pre-oiled filter element available in red or stainless steel jacketed styles
• Backing plates offered in standard aluminum, chrome, or black finish options
• Complete hardware and detailed installation instructions included

Compatibility Notes:

• Designed for 1991-2014 Harley-Davidson Sportster models with CV carburetors or electronic fuel injection
• Will physically fit 1988-1990 models, but the integrated breather system is not functional on these earlier model years

This kit provides a direct bolt-on performance upgrade that replaces the restrictive stock air cleaner assembly. The open-element design maximizes airflow to the engine while the integrated breather routing maintains proper crankcase ventilation without external hoses.