Bearing, Gasket and Seal Kit (BK137A) Standard Transmission Bearing, Gasket and Seal Kit B4 (4-Speed) RWD Mazda B2000 1980-1984 (2.0L) (Rear Load) MRX4R (4-Speed) RWD Mazda Rotary RX7 1979-1980 (1.1L) (Mazda) Part #: BK137A Decrease Quantity: Increase Quantity: