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    • Vacuum Secondary Diaphragm Carburetor Numbers R3659 R4365-1 R4382-1 R4383-1 R4393-2 R4394-2 R4671 R4672 R4789 R4790 Holley
    • Vacuum Secondary Diaphragm Carburetor Numbers R3659 R4365-1 R4382-1 R4383-1 R4393-2 R4394-2 R4671 R4672 R4789 R4790 Holley
    • Vacuum Secondary Diaphragm Carburetor Numbers R3659 R4365-1 R4382-1 R4383-1 R4393-2 R4394-2 R4671 R4672 R4789 R4790 Holley
    Sale!

    Holley Vacuum Secondary Diaphragm, Viton, for Outboard 6-Pack Carburetors | 135-6

    Vendor: Holley
    Part Number: 135-6
    Save $9.16
    Sale Price $67.79 Regular Price $76.95

    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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    This Viton vacuum secondary diaphragm is built for outboard 6-pack carburetor applications, replacing the OEM diaphragm on multiple Holley carburetor numbers.

    Specifications:

    • Brand: Holley
    • Category: Air and Fuel Delivery
    • Material: Viton
    • Part Type: Carburetor Accelerator Pump Diaphragm
    • Product Type: Vacuum Secondary Diaphragm
    • Sub Category: Carburetion
    • Part Number: 135-6

    Fits carburetor numbers R3659, R4365-1, R4382-1, R4383-1, R4393-2, R4394-2, R4671, R4672, R4789, and R4790.

    FAQ

    What carburetors is this diaphragm designed for?

    It's primarily used on outboard 6-pack carburetors, covering Holley carburetor numbers R3659, R4365-1, R4382-1, R4383-1, R4393-2, R4394-2, R4671, R4672, R4789, and R4790.

    What is the diaphragm made from?

    Viton, an OEM-grade material.

    What does this part do?

    It's the vacuum secondary diaphragm that actuates the secondary throttle opening based on engine vacuum signal.

    What is the part number?

    Holley part number 135-6.

    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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