SPI SPI RING SET

High-silicon content Hypereutectic cast aluminum material for less heat expansion. Hard anodized crowns are 75% stronger than non-anodized, providing minimal expansion and reducing the chance of cold seizures when combined with Teflon/Molybdenum coated skirts. High-performance pistons are engineered in the USA, manufactured in TaiwanTighter clearances, increased hardness, longer life and reduced scuffingFeatures machined, smooth piston crowns for reduced carbon buildup, Increased horsepower and fuel economy.