18-346 Ness, Stage 1 Big Sucker air cleaner. Slot Track B

The Arlen Ness Stage 1 Big Sucker air cleaner kit is a legendary performance upgrade designed to maximize airflow for increased horsepower and torque. This Slot Track B version features a black anodized outer cover and a matching black backing plate. The patented hidden breather technology uses O-rings at the heads and exits directly into the throttle body, creating a clean, virtually closed-loop system without the need for external hoses. It includes a pre-oiled high-performance cotton gauze filter and a radius air inlet for smooth, unobstructed flow. This kit fits 1999–2006 Twin Cam models with CV carbs, 2001–2015 Softails, 2004–2017 Dynas (excluding the 2017 FXDLS), and 2002–2007 Touring models.