{"product_id":"bbtv-668-engine-piston-ring","title":"BBTV 668 Engine Piston Ring","description":"\u003ch2\u003eEngine Piston Ring for GM V8 Applications\u003c\/h2\u003e\u003cp\u003eThis engine piston ring set is built for a wide range of Chevrolet and GMC truck and utility applications with a 3.875-inch bore and standard oversize. Part number 668 is specified with phosphate-treated top and second rings, plus a chrome-treated first oil ring for controlled wear characteristics.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard oversize configuration for matching the listed engine bore.\u003c\/li\u003e\n\u003cli\u003eGrey iron top ring and second ring for proven sealing performance.\u003c\/li\u003e\n\u003cli\u003ePhosphate surface treatment on the top and second rings.\u003c\/li\u003e\n\u003cli\u003eSteel rail and stainless expander first oil ring with chrome surface treatment.\u003c\/li\u003e\n\u003cli\u003eFits many Chevrolet and GMC truck, van, and Suburban engine applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003ePart number 668 is an engine piston ring set for 6-cylinder engine applications with a 3.875-inch bore. The ring package uses a grey iron top ring and second ring, with phosphate surface treatment on both compression rings to support consistent cylinder sealing and wear control. The first oil groove uses a steel rail and stainless expander design with a chrome surface treatment for oil control. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 909P, 980P) for the same application.\u003c\/p\u003e\u003cp\u003eCompatible with Chevrolet and GMC platforms including C10 Pickup, K20 Pickup, Blazer, Suburban, and related truck and van models. Part number 668 is also listed across multiple GMC and Chevrolet heavy-duty and utility applications from the 1960s through the 1980s, making it a direct match for many vintage GM engine rebuilds.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestoring compression sealing in worn cylinder bores.\u003c\/li\u003e\n\u003cli\u003eReducing oil consumption caused by ring wear.\u003c\/li\u003e\n\u003cli\u003eAddressing blow-by from tired piston ring sets.\u003c\/li\u003e\n\u003cli\u003eSupporting rebuilds on older Chevrolet and GMC engines.\u003c\/li\u003e\n\u003cli\u003eReplacing rings with incorrect bore or groove dimensions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify bore size, groove widths, and ring end gap before installation. Confirm the engine application against the listed fitment for Chevrolet and GMC models, including C10 Pickup, K20 Pickup, and related truck platforms. Clean piston ring grooves thoroughly and follow standard engine assembly procedures for ring orientation and gap placement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eThis part is cataloged with OE-style dimensional and material specifications for the listed applications. Part number 668 is referenced across multiple interchange numbers, including 909P and 980P, for the same engine family.\u003c\/p\u003e","brand":"BBTV","offers":[{"title":"Default Title","offer_id":53669307056309,"sku":"BBTV-668","price":51.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/HA_668_Fro.jpg?v=1793686987","url":"https:\/\/www.partcatalog.com\/products\/bbtv-668-engine-piston-ring","provider":"PartCatalog","version":"1.0","type":"link"}