Description
Proper engine breathing is fundamental to reliable performance, and restrictive stock air cleaners rob your Evolution engine of power and efficiency. The ARLEN NESS Slot-Track Stage-1 delivers maximum airflow through a radius-designed inlet while eliminating external breather hoses that create clutter and maintenance headaches. Its patented hidden breather technology routes crankcase ventilation cleanly at the injector/carb mouth, giving you a cleaner engine bay and measurable performance gains.
Key Features & Specifications:
- Evolution engine fitment
- One-piece aluminum backing plate
- Patented hidden breather design
- O-ringed breather connections
- Radius air inlet geometry
- Steel outer cover included
- High-performance filter included
- Synthetic filter (water-resistant)
- Four-layer cotton option
- Washable, reusable filters
- No external hoses required
- Bolt-on installation
- Complete hardware included
- MPN: 50-837
- Black finish









