The Bert Transmissions Needle Bearing 40x45x27 is engineered for high performance in manual transmissions. Featuring a robust roller bearing design with an internal diameter of 40mm and an external diameter of 45mm, this bearing ensures flawless operation under high stress. Suitable for input shafts in Bert second-generation transmissions, it provides exceptional load-bearing capabilities. With dimensions close to its inch equivalents, this bearing offers a reliable solution for maintaining drivetrain efficiency and longevity.