• ALL26126.jpg
    • Allstar Performance Rear Main Seal Adapter 86-Up Pan Billet Aluminum | ALL26126
    • Allstar Performance Rear Main Seal Adapter 86-Up Pan Billet Aluminum | ALL26126
    • Allstar Performance Rear Main Seal Adapter 86-Up Pan Billet Aluminum | ALL26126
    • ALL26126.jpg

    Allstar Performance Rear Main Seal Adapter 86-Up Pan Billet Aluminum | ALL26126

    Vendor: Allstar Performance
    Part Number: ALL26126
    $132.99

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Product DetailsFAQReviewsRelated Products

    This Allstar Performance rear main seal adapter is a billet aluminum adapter that allows installation of a two-piece style crankshaft seal and an early, pre-1986 crankshaft into a 1986-and-newer small block Chevy (pre-LS) engine using a 1986-and-up style oil pan. The adapter includes mounting hardware. An alignment tool (sold separately) is available and recommended to ensure proper installation and centering of the adapter plate. Part number ALL26126.

    Allstar Performance Spec Sheet (PDF)

    Allstar Performance Instruction Sheet (PDF)

    Compatibility

    This adapter is built for 1986-and-newer small block Chevy (pre-LS) engines using a 1986-and-up style oil pan. This is an engine block and pan generation fitment, not a specific vehicle-year application.

    FAQ

    What does the ALL26126 rear main seal adapter do?

    It allows installation of a two-piece style crankshaft seal and an early, pre-1986 crankshaft into a 1986-and-newer small block Chevy (pre-LS) engine.

    What pan style is the ALL26126 designed for?

    It is designed for the 1986-and-up style oil pan.

    What material is the adapter made from?

    It is made from billet aluminum.

    Is mounting hardware included?

    Yes, the adapter includes mounting hardware.

    Is an alignment tool needed for installation?

    An alignment tool is available separately and recommended to ensure proper installation and centering of the adapter plate.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy
    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy
    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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