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Upgrade your engine's performance with the Hastings 2M6127040 piston ring set designed for 80" Big Twin applications. This comprehensive set includes top compression rings, second compression rings, and oil control rings, all engineered to optimize engine efficiency and longevity. The top compression rings feature a barrel face that enhances heat transfer between the piston and cylinder wall, facilitating efficient cooling and preventing overheating during high-performance operation. These rings also effectively control combustion gases, ensuring maximum energy transfer from the expanding gases to the crankshaft for improved power output. The second compression rings are reverse torsional taper face rings that promote superior side sealing, preventing oil from leaking under and behind the rings, which results in better oil economy and cleaner combustion. Their reverse twist design, combined with taper-machined ring faces, duplicates the scraping edge of positive torsional rings, further enhancing sealing performance. The oil control rings are three-piece flex vent types, with a small cross-sectional profile that conforms better to the bore, providing uniform pressure through four steel rails and two expanders. This design ensures positive oil control, reducing oil consumption and emissions. Crafted in the USA, these rings are made with high-precision manufacturing standards to ensure durability and consistent performance. Special attention is required during installation, especially for the top ring end gap, due to the thermal conductivity and design of Hastings pistons. The set includes enough rings for two pistons, with two rings per groove, except for the rails which are paired with a single expander ring. This piston ring set is ideal for restoring or enhancing your Big Twin's engine, offering reliable sealing, efficient heat transfer, and improved oil economy for a smoother, more powerful ride.
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