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Upgrade your engine's performance with the HASTINGS 2M4941010 piston ring set designed specifically for 95 to 103 inch big bore Twin Cam engines. This comprehensive set includes top compression rings, second compression rings, and oil control rings, all engineered to optimize sealing, heat transfer, and oil economy. The top compression rings feature a barrel face that enhances heat transfer from the piston to the cylinder wall, helping maintain optimal operating temperatures and reducing engine wear. This design ensures efficient combustion chamber sealing, allowing the piston to effectively transfer the energy from expanding gases to the crankshaft for reliable power delivery. The second compression rings are Napier style with a reverse twist and taper-machined face, which duplicate the OD bottom side scraping edge of a positive twist torsional ring. This configuration promotes side sealing, preventing oil from leaking under or behind the ring and thus improving oil consumption and reducing emissions. The oil control rings are a three-piece flex vent design, allowing for a small cross-sectional area that conforms better to bore walls for consistent oil control. This design features four steel rails and two expanders that exert uniform pressure, ensuring efficient oil scraping and film thickness regulation. All rings are made in the USA, ensuring quality and durability. This set includes enough rings for two pistons, with two rings per groove and two rail rings per one expander ring, making it suitable for rebuilds or upgrades. Proper installation of these rings will enhance engine reliability, improve oil economy, and maintain optimal combustion chamber sealing, all while supporting the demanding performance needs of high-bore Twin Cam engines.
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