PPE 11.5"/12"-14-Bolt Heavy-Duty Cast Aluminum Rear Differential Cover (2020-2026 Duramax)

A cast aluminum alloy differential cover with precision-cast fins and internal scrapers to improve heat dissipation and reduce fluid temperature.

• The description claims that excessive heat degrades differential fluid and can lead to gear and bearing wear.
• The description claims that the cover increases oil capacity by 0.7 quart and improves thermal capacity.
• The description claims that half-inch external fins improve heat dissipation and increase impact resistance.
• The description claims that precision-placed internal windage scrapers reduce heat generation and power loss.