{"product_id":"speed-pro-r-9903-engine-piston-ring-set","title":"Speed Pro R-9903 Engine Piston Ring Set","description":"\u003ch2\u003eSpeed Pro R-9903 Piston Ring Set\u003c\/h2\u003e\u003cp\u003eSpeed Pro R-9903 is a standard-size engine piston ring set for 4.0000-inch bore applications. It combines a ductile iron plasma moly top ring, cast iron second ring, and standard-tension oil ring design for dependable sealing in compatible Ford, Chevrolet, Dodge, GMC, Mercury, and related V8 builds.\u003c\/p\u003e\u003cp\u003eBuilt for Windsor and other listed applications, this ring set is a direct-fit choice for performance rebuilds and street engines where bore size, groove width, and ring face design must match the piston package.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: R-9903\u003c\/li\u003e\n\u003cli\u003e4.0000-inch bore diameter and outside diameter\u003c\/li\u003e\n\u003cli\u003eTop ring material: ductile iron plasma moly\u003c\/li\u003e\n\u003cli\u003eTop ring face design: torsional barrel face\u003c\/li\u003e\n\u003cli\u003eSecond ring face design: reverse torsional\u003c\/li\u003e\n\u003cli\u003eSecond ring material: cast iron\u003c\/li\u003e\n\u003cli\u003eOil ring design: SS50U with standard tension\u003c\/li\u003e\n\u003cli\u003eRing groove widths: 5\/64 x 5\/64 x 3\/16 in.\u003c\/li\u003e\n\u003cli\u003eStandard size, non-file-fit design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eSpeed Pro R-9903 is engineered for 4.0000-inch bore engines that use 5\/64-inch top and second ring grooves with a 3\/16-inch oil ring groove. The plasma moly top ring helps provide a durable sealing surface, while the reverse torsional second ring and SS50U oil ring design support consistent cylinder sealing and oil control in rebuilt engines. This part cross-references Eastern Catalytic 40882 for the same application.\u003c\/p\u003e\u003cp\u003eCompatible With 1962-1997 Ford F-150, F-250, F-350, Bronco, E-Series vans, LTD, Mustang, Thunderbird, Lincoln Continental, Mark VI, Mark VII, Town Car, Mercury Grand Marquis, Capri, Cougar, Marquis, and Versailles applications listed in the fitment data. It also covers selected Chevrolet Camaro, Corvette, Impala, Malibu, Nova, El Camino, Blazer, Monte Carlo, and GMC truck and van applications, plus listed Dodge, Chrysler, Plymouth, Buick, Oldsmobile, and Pontiac models.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Solve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLow compression from worn or damaged piston rings\u003c\/li\u003e\n\u003cli\u003eExcessive oil consumption caused by poor ring sealing\u003c\/li\u003e\n\u003cli\u003eBlow-by and crankcase pressure issues\u003c\/li\u003e\n\u003cli\u003eLoss of cylinder sealing after an engine rebuild\u003c\/li\u003e\n\u003cli\u003eMismatch between piston groove widths and ring set dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify 4.0000-inch bore size before ordering.\u003c\/li\u003e\n\u003cli\u003eConfirm piston groove widths are 5\/64 x 5\/64 x 3\/16 in.\u003c\/li\u003e\n\u003cli\u003eUse with the listed H653P piston applications where specified in fitment notes.\u003c\/li\u003e\n\u003cli\u003eCheck cylinder wall condition, ring end gaps, and ring orientation during assembly.\u003c\/li\u003e\n\u003cli\u003eFollow the engine builder’s break-in and lubrication procedures for plasma moly rings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eSpeed Pro states that its HP engine components are built to deliver value and quality for track, strip, and street use. R-9903 is a standard-size piston ring set made to meet the dimensional requirements shown in the product data for the listed applications.\u003c\/p\u003e","brand":"Speed Pro","offers":[{"title":"Default Title","offer_id":44495939535029,"sku":"BHVW-R-9903","price":202.72,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SE_R9903_Top.jpg?v=1775021104","url":"https:\/\/www.partcatalog.com\/products\/speed-pro-r-9903-engine-piston-ring-set","provider":"PartCatalog","version":"1.0","type":"link"}