Rocker Box / Cylinder Head Breathers. Fits Twin Cam 1999-2017

Crafted from premium 6061 aluminum and anodized in the iconic S&S blue, they look good and perform even better. Inside you will find our proprietary Labyrinth design to significantly reduce oil pass-through, keeping your engine running cleaner.

* 6061 Aluminum for Increased durability over stock

* Unique Labyrinth design to significantly reduce oil consumption

* Maintenance free design replaces ineffective mesh filter

* Less oil carry over into the intake

* Replaces OEM # 17025-03A

* Made in the U.S.A.