{"product_id":"4032-alloy-piston-set","title":"4032 Alloy Piston Set","description":"The Supertech Performance P4-MA84-CR9 piston is engineered as a high-performance internal engine component for the Mazda Miata 1.8L engine. These pistons are crafted from an extruded, high-silicone enhanced 4032 alloy, which includes additional copper, nickel, and magnesium. This advanced material composition provides low thermal expansion, superior wear resistance, and higher thermal conductivity, allowing the pistons to withstand significant stress, such as up to 42psi of boost with alcohol.\n\nThe manufacturing process involves a two or three-step forging technique to create a fine structural grain, followed by precision machining in state-of-the-art CNC machines. Multiple heat treatments are applied to achieve high tensile strength and evenly distributed hardness across the piston. Standard features include contact reduction grooves, and the pin bores are honed and reamed for an exact fit. The accompanying wrist pins are made from cold-extruded chrome moly steel for maximum strength and are secured with wire clip locks. To further enhance durability and performance, the pistons are finished with a phosphate dry lubricant coating. This coating protects the rings from micro-welding and improves lubrication along the skirt and cylinder area.\n\nThese pistons are designed with a 84.00mm bore and a 1mm over size, featuring a compression ratio of 9:1 and a volume of -4cc. The compression height is 1.201 inches (30.5mm), with a stroke of 3.346 inches and a rod length of 5.228 inches. The pin diameter is 20mm. The specific Piston P\/N is P4-MA84-CR9, and it is designed for use with the GNH8400 piston ring set. These pistons are rated to handle up to 560 horsepower at 30 PSI.","brand":"Supertech Performance","offers":[{"title":"Default Title","offer_id":52663925473592,"sku":"P4-MA84-CR9\/GNH8400","price":658.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687720650.png?v=1784330902","url":"https:\/\/store.motormia.co\/products\/4032-alloy-piston-set","provider":"MOTORMIA","version":"1.0","type":"link"}