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The CP Pistons 1.5mm Napier second ring is a steel piston ring specified for a 4.095-inch bore with a back-cut profile and taper hook groove. Offered as a direct ring replacement, it provides the exact 1.5mm thickness and Napier back-cut geometry required for proper seating and oil control in engines that call for this ring specification. Use it where the listed bore and groove style match the piston design.
CP Pistons 1.5mm Steel Napier Back Cut 2nd Ring 4.095 Bore Taper Hook Groove
