The original Porsche 930 transmission differential side cover is made of cast aluminum, not to mention it’s pretty thin. Under load there can be a tremendous force applied to this cover, and it can break, sometimes resulting in a damaged ring and pinion-or worse. Upgrading to a billet side plate will add significant strength and increased reliability to the differential section.

Our design features include:

• A ring gear thrust bolt to reduce ring gear deflection under load
• Ports that can be used for an oil cooling system
• Cross drilled oil passageways for the differential bearing

Comes with (3) 3/4 - 16 O ring plugs.

Replaces part 930.301.311.02

930/30, 930/33, 930/34, 930/36, 930/37, 930/67