Motul Transmission and Rear Diff (Gear 300) Fluid Change 07-21 WRX STI

Motul Gear 300 gear Oil is the correct fluid for the 07-21 WRX STI 6 Speed with the OEM R180 Rear Differential. Transmission Fulid change is 4L of Gear 300. Rear Differential is 1 liter of Gear 300 you can add the optional Company23 13mm Adapter to properly remove the factory drain "bolt" for the rear differential.

If this is a dry fill for a brand new transmission, or one that has been sitting, you'll want 5L of Gear300