Hastings 2M5693040 Premium Ductile Plasma-Moly 8-Cylinder Piston Ring Set .040 Oversize

The Hastings 2M5693040 is a Premium Ductile Plasma-Moly piston ring set designed for 8-cylinder engines at .040" oversize bore. Part of Hastings' renowned 2M (Premium Ductile Moly) Series, this set delivers the sealing performance and durability demanded by professional engine builders and serious enthusiasts alike.

Key Features:

• Plasma-Moly Top Ring: Top compression ring is manufactured from proprietary shell-mold, high-tensile strength ductile iron and coated with an impact-resistant plasma-moly alloy for exceptional wear resistance and fast break-in
• Reverse Torsional Second Ring: The second groove ring uses a reverse torsion taper-face design that creates a sharp OD bottom scraping edge to wipe oil from the cylinder wall and back into the crankcase
• Flex-Vent® 3-Piece Oil Control Ring: Features Hastings' legendary Flex-Vent® expander design, first introduced in 1956, which provides uniform radial pressure against the cylinder wall and significantly greater oil drainage capacity compared to conventional one-piece oil rings
• .040" Oversize: Sized for engines that have been bored .040" over standard for a precise, reliable fit after cylinder reconditioning
• Full 8-Cylinder Set: Includes all rings needed for all 8 pistons — top compression, second compression, and oil control rings

Hastings Manufacturing has been a global leader in piston ring engineering for over 100 years, offering one of the most comprehensive lines of piston rings in the world. The 2M5693040 is built to restore proper compression, minimize blow-by, and control oil consumption in rebuilt or reconditioned 8-cylinder engines.