BMW Medium Case (E30) Billet Diff Cover


Include Sensor Delete
No Sensor Delete

Our Billet E30 based Differential Cover is designed and built with no compromises. This cover is a direct fit for the E30 chassis and bolts up to any medium case (188mm) BMW differential commonly found in the vintage models. This cover features duel mounting ears, an internal baffle wall and multiple ports as standard.

The internal ring gear baffle which comes as standard on our diff covers aids in keeping differential fluid attached to the ring gear as it travels along the back of the cover. This action allows differential fluid to be more adequately dispersed to the extremities of the differential case aiding in lubrication of the bearings and reducing fluid temps.

The increased fluid capacity of this cover allows for lower operating temperatures of your differential during racing conditions which promotes longer life for the clutches, bearings and inserts in your differential.

The cover comes pre-assembled with Delrin diff bushings which utilize internal steel sleeves to maximize longevity. As standard this various ports can be utilized for custom coolers and sensors. The ports available are as follows:

  • 1x -8 ORB Upper Port (diff cooler return)
  • 2x -8 Lower Ports (drain port, diff cooler feed port)
  • 1x 1/8 NPT Port (temp sensor port)
  • 1x -8 ORB Mid Port (fluid fill and level port)
  • 1x 1/8 NPT Vent Port (comes standard with brass breather)

This cover is machined from solid 6061-T6 aluminum, along with all its internal components. Cover can be supplied as raw billet aluminum or anodized black.

Included with the cover are a set of plates for welding or bolting into the e30 rear cross-member to locate the second diff ear. A complete set of new hardware is included. The cover comes standard with ORB plugs installed into the ports.

Weight 10 lbs
Dimensions 18 × 18 × 10 in
Speed Sensor

Include Sensor Delete, No Sensor Delete

Anodize Colour

Raw, Clear, Black

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