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Add reliable oxygen sensor capability to your exhaust system with the Earl’s 18mm x 1.5 O2 Sensor Weld-In Bung, designed for EFI conversions and wideband air/fuel ratio monitoring on carbureted or fuel-injected engines. Precision-machined from durable mild steel, this weld-in fitting provides a secure mounting solution for most factory and aftermarket oxygen sensors, ensuring accurate sensor placement and dependable readings.
Featuring a recessed step design, this O2 sensor bung allows for easy installation by drilling a hole in the exhaust system and welding the fitting into place. The standard 18mm x 1.5 thread size is compatible with GM, Ford, Chrysler, and most import vehicle oxygen sensors, making it a versatile choice for custom exhaust fabrication and tuning setups. Sold individually, it is ideal for performance builds, restorations, and engine management upgrades.
Features:
Weld-in oxygen sensor bung for EFI and wideband A/F installations
Standard 18mm x 1.5 thread fits most OEM and aftermarket O2 sensors
Recessed step design for accurate positioning and easy installation
Durable mild steel construction for exhaust system compatibility
Ideal for GM, Ford, Chrysler, and most import applications
Sold individually for custom exhaust fabrication
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You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
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Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
