Cusco Increased Capacity Rear Differential Cover Silver R180 2004-2021 STI

Enhance your Subaru WRX STI’s drivetrain with the Cusco Increased Capacity Rear Differential Cover for the R180. Designed as a direct replacement for your factory cover, this premium billet aluminum upgrade boosts oil capacity and improves cooling, ensuring your differential performs optimally during aggressive driving or track days.

This rear differential cover increases oil capacity from the factory 0.8–0.9L to 1.2–1.3L, reducing heat buildup with internal baffling and heat sink fins. It also features pre-tapped M16 x P1.5 holes for an optional external oil cooler and includes four hole plugs for added versatility. Finished in anodized silver, it combines durability with a sleek look. Note that Subaru OEM air breather cap and gasket are required for installation.

Ideal for enthusiasts who push their Subaru WRX STI on circuits or spirited drives, this Cusco cover helps maintain differential reliability and performance. Upgrade your drivetrain today and experience improved cooling and capacity.