Billet Finned Rear Differential Cover

The VAC Motorsports Rear Differential Cover is a direct-fit upgrade for the E9X M3, constructed from billet aluminum with integrated cooling fins. This cover is engineered to keep your M3's differential fluid at optimal temperatures, preventing costly failures during demanding driving conditions such as track sessions. It increases oil capacity by an additional 0.5 quarts and features an integral vent suitable for street use, with pre-machining for an external catch-can setup for race applications. Additionally, a port is provided for the easy installation of an oil temperature sensor, allowing for integration with aftermarket gauges or data logging systems.