{"product_id":"allstar-performance-rear-main-seal-adapter-pre-86-pan","title":"Allstar Performance Rear Main Seal Adapter — Fits 1955-86 Small Block Chevy","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 Allstar Performance\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eAllstar Performance is America's leading circle-track racing parts manufacturer. From aluminum panels and chassis components to brake hardware, steering boxes, and oval-track shock packages — every Allstar product is born from sprint car and modified racing experience.\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\/gNe3kYZuBnU\" 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\u003eUpgrade Your SBC Rear Main Seal\u003c\/h2\u003e\u003cp\u003eModernize your classic Small Block Chevy engine with the Allstar Performance Rear Main Seal Adapter. This kit is specifically engineered to allow the installation of a modern 1-piece rear main seal into a traditional 1955-86 2-piece rear main seal block. By bridging the gap between vintage engine blocks and modern sealing technology, this adapter significantly reduces the risk of oil leaks, keeping your engine bay clean and your oil pressure consistent.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eApplication: 1955-86 Small Block Chevy\u003c\/li\u003e\n\u003cli\u003eConversion: 1-Piece Block to 2-Piece Crank\u003c\/li\u003e\n\u003cli\u003eMaterial: Premium Aluminum\u003c\/li\u003e\n\u003cli\u003eKit Includes: Adapter and necessary hardware\u003c\/li\u003e\n\u003cli\u003eFunction: Prevents rear main oil leaks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis adapter is a must-have for engine builders performing a rebuild or a performance upgrade on a classic Chevy small block. The high-quality aluminum construction ensures a perfect fit and long-lasting durability under high-stress conditions. By eliminating the common leak points associated with older 2-piece seal designs, you can focus on performance rather than maintenance. Installation requires proper preparation of the block, but the results provide peace of mind for high-performance street and track applications. Ensure your engine is sealed correctly with this precision-engineered kit. Find the best engine internal components and sealing solutions at GGCRACING.\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 Allstar Performance 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\/asphalt-tire-book\" style=\"color:#0066cc;text-decoration:none;\"\u003eAllstar Performance Asphalt Tire Setup Log Book — 50 Sheet Pad\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/circle-track-set-up-book\" style=\"color:#0066cc;text-decoration:none;\"\u003eAllstar Performance Circle Track Set-Up Book - Chassis Setup Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/tire-log-decals-8pk\" style=\"color:#0066cc;text-decoration:none;\"\u003eAllstar Performance Tire Log Decals — 8 Pack Information Stickers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/tire-log-decals-40pk\" style=\"color:#0066cc;text-decoration:none;\"\u003eAllstar Performance Tire Log Decals — 40 Pack Bulk Information Stickers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/tire-spoon-24in-straight-w-round-end\" style=\"color:#0066cc;text-decoration:none;\"\u003eAllstar Performance 24in Straight Tire Spoon w\/ Round End — Steel\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\":\"Allstar Performance Rear Main Seal Adapter \\u2014 Fits 1955-86 Small Block Chevy\",\"description\":\"Convert your 1955-86 SBC to a 1-piece rear main seal with this Allstar Performance adapter kit. High-quality aluminum construction. 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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 Allstar Performance?\",\"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 Allstar Performance Rear Main Seal Adapter \\u2014 Fits 1955-86 Small Block Chevy?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. 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