Skip to Product Info
    • 534-49_01.jpg
    • 534-49_02.jpg
    • 534-49_03.jpg
    Sale!

    Holley Oxygen Sensor O2 Bung, Weld-In Style, 18mm x 1.5 | 534-49

    Vendor: Holley EFI
    Part Number: 534-49
    Save $2.10
    Sale Price $16.81 Regular Price $18.91

    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.
    Payment & Security

    Secure, encrypted checkout. Card details go straight to the payment processor and are never stored by us.

    • Amazon
    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa
    Share to:

    This weld-in O2 sensor bung fits any application that uses a standard oxygen sensor, giving installers a clean, secure mounting point in the exhaust.

    Specifications:

    • Type: Oxygen sensor bung, weld-in style
    • Material: 12L14 cold roll steel
    • Thread Size: 18mm x 1.5
    • Mounting: Weld-on
    • Application: Universal (any O2 sensor application)
    • Part Number: 534-49

    Installation requires welding and a 7/8" hole drilled into the exhaust. The oxygen sensor should be mounted tip-down, at a minimum of 10 degrees from horizontal and 15 degrees from perpendicular. Sensor not included.

    FAQ

    Is the oxygen sensor included with this bung?

    No. This is the weld-in bung only; the oxygen sensor is sold separately.

    What size hole is needed for installation?

    Installation requires welding into a 7/8" hole drilled into the exhaust.

    What angle should the sensor be mounted at?

    The sensor tip should point downward, at a minimum of 10 degrees from horizontal and 15 degrees from perpendicular.

    What thread size does this bung use?

    It uses an 18mm x 1.5 thread, standard for most oxygen sensors.

    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.

    Recently Viewed