SE121 Upper gear housing with 30/23 teeth Suitable for Bravo 1 with 1.65 ratio Suitable for Bravo 2 with 2.20 ratio Suitable for Bravo 3 with 2.20 and 2.43 ratios Not a replacement for Bravo X, XR or XZ drives. Designed for up to 425 hp. Installation kit and anode kit not included.