Aftermarket gasket kit for Yanmar 6LY Heat Exchanger kit includes the following gaskets/ seal and o-rings
1 x 119578-44420 Seal
2 x 119578-44350 O-ring
1 x 119578-44430 seal
1 x 24311-000400 O-ring
2 x 119175-33350 O-ring
2 x 119574-44170 Gasket
Recmar Part REC 6LYWC.