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The HASTINGS 2M6482 piston ring set is designed to provide optimal sealing and performance for 74-inch Big Twin engines. This kit includes top compression rings, second compression rings, and oil control rings, all engineered to meet high standards of durability and efficiency. The top compression rings feature a barrel face design that enhances heat transfer between the piston and cylinder wall, promoting better thermal management during engine operation. These rings also help in controlling combustion gases, allowing the piston to effectively transfer the energy of expanding gases to the crankshaft for power generation. The second compression rings are reverse torsional taper face rings that promote side sealing, preventing oil from passing under and behind the ring, thereby improving oil economy. Their reverse twist and taper-machined face emulate the bottom scraping edge of a positive twist torsional ring, ensuring a secure seal. The oil control rings are three-piece flex vent types, designed with a small cross-sectional area for better bore conformity. The three-piece construction provides uniform pressure through four steel rails and two expanders, ensuring reliable oil control and reducing oil consumption. Made in the USA, these rings are compatible with piston applications requiring precision and durability. Proper installation is critical due to the thermal conductivity and design of KB pistons; instructions included should be followed carefully to achieve optimal performance. This set includes enough rings for two pistons, with two rings per groove, except for the rails which are two rails per one expander ring. This comprehensive piston ring set is ideal for rebuilds or performance upgrades on Big Twin engines, offering reliable sealing, heat transfer, and oil control to extend engine life and improve efficiency.
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