These rings will fit all Mercury V-6 Cyl. 250XB, 300X 3.0 Liter EFI OG980600 OT800999. WSM Rings are top quality RIK Japanese high performance rings. Will fit OEM factory pistons.
Wiseco rings will fit Wiseco forged piston only.
Ring set includes:
1 Top ring
1 Bottom ring
O.E. No. 858772A12
This ring set will fit the following applications only,
Mercury 250XB, 300X 3.0 Liter EFI OG980600 OT800999
Serial # Required for purchase
