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