Mercury Performance gearcase i.d

[Yegboats]

Need help identifying this performance gearcase.
Looks like engine was sold originally with no gearcase and they put this on.The drives listed on the epc for the serial numbers dont seem to have low water pickups.
Ot999575 300 X XL

 

[Faztbullet]

Just a stock 4 hole unit...older models where 2 hole. From the color most likely a SEI 216 replacement

 

[Yegboats]

Just a stock 4 hole unit...older models where 2 hole. From the color most likely a SEI 216 replacement

Its silver. Hard to tell in the pics. Thx for pointing me toward sei though.