SE121 Upper 32/27 Tooth Count Replaces Bravo Upper | SEI 90-121-01C Sterndrive Engineering SE121 Upper 32/27 Tooth Count Replaces Bravo Upper | SEI 90-121-01B SE121 Upper 32/27 Tooth CountFits Bravo 1 1.5 RatioFits Bravo 2 1.65 and 2.00 Ratio'sFits Bravo 3 1.5, 1.65 and 2.00 Ratio's Brunswick Corporation is the Original Equipment Manufacturer (OEM). Sterndrive Engineering, Inc. (or SEI) has no affiliation with the Brunswick Corporation. Sterndrive Engineering, Inc. manufactures a stern drive designed to replace Mercury Marine's MerCruiser, Alpha One, R, MR, and Gen II stern drives. MerCruiser, Alpha One, Gen II, R, and MR are trademarks of the Brunswick Corporation. As with any after-market product, any warranties governing products manufactured and/or sold by Brunswick Corporation will not apply to products manufactured and/or sold by Sterndrive Engineering, Inc. (or SEI) or to products damaged due to the operation of an SEI product.