S&S Billet Head Breather - M8

• Precision-Machined 6061 Billet Aluminum – Replaces the stock plastic breathers that can warp or crack under high heat and pressure.
• Dual O-Ring Seals – Ensures a tighter, leak-free fit in the head, preventing oil seepage and maintaining consistent crankcase pressure.
• Labyrinth Venting Design – Significantly reduces oil carryover into the intake, keeping combustion cleaner and reducing carbon buildup.
• Improved Emissions & Longevity – Lowers the amount of oil being burned, extending engine life and improving overall efficiency.
• Made in the USA – Designed and manufactured to S&S’s industry-leading standards for performance and durability.

Why Upgrade:
When performing a Stage 2 or higher build, crankcase pressure and heat increase substantially due to higher compression and airflow. The stock plastic breathers struggle to handle these loads, often leading to oil blow-by, leaks, and reduced performance. Upgrading to S&S Billet Head Breathers ensures proper crankcase ventilation, cleaner intake air, and long-term reliability—a must-have for any high-performance Milwaukee-Eight build.

Note: Not compatible with 2023 FLHXSE/FLTRXSE models.