{"product_id":"mahle-51240cp-020-engine-piston-ring-set","title":"Mahle 51240CP.020 Engine Piston Ring Set","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eMAHLE piston ring set 51240CP.020 is a standard 0.020-inch oversize ring set for 4.020-inch bores. It is built for engines that need precise ring sealing, controlled oil use, and reduced friction in a rebuild or overhaul.\u003c\/p\u003e\u003cp\u003eCompatible With classic applications including Chevrolet Monza, Pontiac Sunbird, and Jeep CJ7, this MAHLE piston ring set 51240CP.020 follows OE-driven engineering priorities for service life and efficiency.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e4.020-inch bore diameter with 0.020-inch oversize sizing\u003c\/li\u003e\n\u003cli\u003eCast iron top ring and second ring for durable sealing performance\u003c\/li\u003e\n\u003cli\u003eStainless steel oil ring assembly for stable oil control\u003c\/li\u003e\n\u003cli\u003eNon-coated ring face for a straightforward replacement specification\u003c\/li\u003e\n\u003cli\u003eStandard grade construction for rebuild applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eMAHLE 51240CP.020 piston rings are engineered around OE requirements, with a focus on lowering friction, reducing ring mass, and helping control engine oil consumption. The ring package uses cast iron for the top and second rings, paired with a stainless steel oil ring assembly, giving the set a balanced material mix for sealing and oil management. The 0.020-inch oversize dimension makes this set appropriate when the cylinder bore has been machined for oversize rings.\u003c\/p\u003e\u003cp\u003eThis part cross-references Hastings Piston Rings 5570020 and Sealed Power E381X20 for the same application. For buyers searching for a piston ring set for Chevrolet Monza, Pontiac Sunbird, or Jeep CJ7 engine rebuilds, MAHLE 51240CP.020 provides a direct-fit specification for the listed bore size and oversize requirement.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive oil consumption from worn ring sealing surfaces\u003c\/li\u003e\n\u003cli\u003eCompression loss caused by ring wear or cylinder wear\u003c\/li\u003e\n\u003cli\u003eFriction buildup that can affect engine efficiency\u003c\/li\u003e\n\u003cli\u003eRebuild needs after cylinder boring to 0.020-inch oversize\u003c\/li\u003e\n\u003cli\u003eOil control issues in older engine assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify bore diameter before installation and confirm the cylinder has been machined for 0.020-inch oversize rings. Match the ring set to the engine’s measured bore and follow standard ring gap, orientation, and break-in procedures during assembly. Fitment includes 1977-1980 Chevrolet Monza, 1977-1980 Pontiac Sunbird, and 1980 Jeep CJ7 among other listed applications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMAHLE piston rings are developed to OE-level requirements and are positioned around friction reduction, oil control, and service life. Part number 51240CP.020 reflects MAHLE’s technical approach to engine sealing components.\u003c\/p\u003e","brand":"Mahle","offers":[{"title":"Default Title","offer_id":53396526137525,"sku":"FLHQ-51240CP.020","price":39.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/VG_51240CP020_Zz1.jpg?v=1790665965","url":"https:\/\/www.partcatalog.com\/products\/mahle-51240cp-020-engine-piston-ring-set","provider":"PartCatalog","version":"1.0","type":"link"}