This listing is for a pair of 80897 gaskets for the T-20976 or T-20970 a H2O Performance Parts replacement riser for Mercruiser riser

Replaces Part Numbers:
Mercruiser: 27-41813, 27-860233, 27-863724
Sierra: 18-0897
Barr: MC47-27-41813
GLM: 30240
Mallory: 9-61413