{"product_id":"sealed-powercast-piston-14","title":"Sealed Power H661CP30 Hypereutectic Piston Set — Fits Big Block Chevy 4.280 Bore","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\u003ch2\u003eHigh-Performance Sealed Power Hypereutectic Pistons\u003c\/h2\u003e\u003cp\u003eRevitalize your Big Block Chevy engine with the Sealed Power H661CP30 piston set. Engineered for reliability and performance, these hypereutectic pistons are designed to handle the rigors of high-output street and strip applications. With a precise 4.280-inch bore diameter and a durable coated skirt, these pistons reduce friction and improve heat dissipation, ensuring your engine runs cooler and lasts longer under pressure.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-strength hypereutectic alloy for superior thermal expansion control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 4.280 inches for precise fitment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Grooves:\u003c\/strong\u003e 5\/64 x 5\/64 x 3\/16 inch configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e Minus 2.00 cc dish design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkirt:\u003c\/strong\u003e Advanced coating to prevent scuffing and wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Complete set of 8 pistons.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese pistons are the ideal choice for builders looking to maintain factory-style reliability while gaining the benefits of modern material science. The hypereutectic construction provides a tighter tolerance fit compared to standard cast pistons, resulting in improved ring seal and reduced blow-by. Whether you are performing a stock rebuild or a mild performance upgrade, this set offers the perfect balance of quality and value. Trust your engine build to the experts at GGCRACING for all your high-performance component needs.\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 H661CP30 Hypereutectic Piston Set \\u2014 Fits Big Block Chevy 4.280 Bore\",\"description\":\"Upgrade your Big Block Chevy with Sealed Power H661CP30 hypereutectic pistons. 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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 H661CP30 Hypereutectic Piston Set \\u2014 Fits Big Block Chevy 4.280 Bore?\",\"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":41068392153172,"sku":"BDBR_H661CP30","price":271.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/SEAH661CP30.jpg?v=1716770280","url":"https:\/\/ggcracing.com\/products\/sealed-powercast-piston-14","provider":"GGCRACING INC","version":"1.0","type":"link"}