THIS IS AN OEM HONDA PART THIS USES AN ORING SOLD SEPARATELY OR YOU CAN JUST USE A PAPER GASKET (NO NEED FOR BOTH) 314G @ e ."O_RING" FOR CARB FLANGE TO MANIFOLD ALL_TRX90 CT90_78_TO_79 FITS_300008 INSOLATOR 1/22P (223H/1004E) THIS WORKS FOR THE BOTTOM OF OUR 215S MANIFOLD TOO 223H/1004E