{"product_id":"main-bearing-set-193","title":"Sealed Power 4221M20 Main Bearing Set - 0.020in Undersize — Fits Vintage Pontiac V8 Engines","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Sealed Power\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eSealed Power engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Sealed Power lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/zlluWbtWig8\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eAuthentic Restoration for Vintage Pontiac V8: Sealed Power 4221M20 Main Bearings\u003c\/h2\u003e\u003cp\u003eEmbark on a meticulous restoration of your vintage Pontiac V8 engine with the \u003cb\u003eSealed Power 4221M20 Main Bearing Set\u003c\/b\u003e. This specialized kit is engineered for rebuilds that require a 0.020 inch undersize, providing the exact fitment and crucial oil clearances needed for historical accuracy and reliable operation. Sealed Power is a name synonymous with quality in engine components, trusted by restorers and enthusiasts for bringing classic engines back to life.\u003c\/p\u003e\u003ch3\u003ePreserving Heritage with Modern Precision\u003c\/h3\u003e\u003cp\u003eMain bearings are the unsung heroes of any engine, particularly in vintage applications where original specifications and durability are paramount. The 4221M20 set is crafted with an unwavering commitment to quality, utilizing materials that offer excellent wear resistance and consistent lubrication. This ensures your vintage Pontiac V8 runs smoothly, quietly, and reliably, preserving its heritage for years to come while benefiting from modern manufacturing precision.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVintage Application:\u003c\/b\u003e Specifically designed for vintage Pontiac V8 engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUndersize:\u003c\/b\u003e 0.020 inches for precise crankshaft journal machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComprehensive Set:\u003c\/b\u003e Contains all necessary main bearings for a complete engine restoration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliable Performance:\u003c\/b\u003e Built to meet or exceed original equipment standards for lasting durability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Choice for Connoisseurs of Classic Pontiac\u003c\/h3\u003e\u003cp\u003eOpting for Sealed Power means choosing a brand that understands the unique demands of vintage engine restoration. The 4221M20 main bearing set provides the critical foundation for a successful rebuild, ensuring your classic Pontiac V8 performs as it should, with the integrity and authenticity you expect. Trust in Sealed Power's legacy of excellence for your most cherished projects. Explore our full range of vintage engine components at GGCRACING.COM.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Sealed Power products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/speed-pro-performance-2015-x3009-r1006\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Speed Pro Performance Street Catalog – 2015 Edition\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/cam-bearing-set-36\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Cam Bearing Set Standard Journal — Fits Small Block Chevy V8\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/main-bearing-spacer-set\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Main Bearing Spacer Set Standard — Fits 351C Crank in SBF\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/rod-bearing-171\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power 1555CPA10 Connecting Rod Bearing - 0.010 in Undersize - Pontiac V8\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/rod-bearing-172\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Rod Bearing 0.020 Undersize — Fits Pontiac V8 Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Sealed Power 4221M20 Main Bearing Set - 0.020in Undersize \\u2014 Fits Vintage Pontiac V8 Engines\",\"description\":\"Restore your vintage Pontiac V8 with the Sealed Power 4221M20 Main Bearing Set, 0.020in undersize. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Sealed Power?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Sealed Power 4221M20 Main Bearing Set - 0.020in Undersize \\u2014 Fits Vintage Pontiac?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most plug-and-play LED upgrades take 15-30 minutes per side. Full retrofits or harness installs may require additional wiring.\"}}]}\u003c\/script\u003e","brand":"Sealed Power","offers":[{"title":"Default Title","offer_id":41013699936340,"sku":"BDBR_4221M20","price":201.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/SEA4221M20.jpg?v=1715888770","url":"https:\/\/ggcracing.com\/en-co\/products\/main-bearing-set-193","provider":"GGCRACING INC","version":"1.0","type":"link"}