Performance-driven transmission top cover engineered to address excessive crankcase pressure in Milwaukee-Eight engines. The CheckM8 system features a one-way reed valve that vents pressure efficiently while retaining oil mist within the system, improving overall engine efficiency and operation.

By reducing internal pressure, it helps minimize oil blow-by from head breathers and allows the engine to rev more freely under load. Proven in performance applications, this upgrade delivers both improved engine response and cleaner operation.

CNC-machined from billet aluminium for strength and precision fitment, it replaces the OEM transmission top cover with a direct bolt-on solution. Designed for durability, performance, and a clean, functional finish.

Features:

• One-way reed valve system to vent excess crankcase pressure
• Reduces oil blow-by from head breathers
• Improves engine efficiency and smoother revving
• CNC-machined billet aluminium construction
• Includes breather hose and filter
• Direct OEM replacement
• Made in the U.S.A.

Fitment:
Compatible with Milwaukee-Eight models (2017+ Touring, 2018+ Softail)