This premium O2 sensor weld bung is the perfect choice for anyone upgrading, modifying or diagnosing their exhaust system. Whether for motorsport, tuning applications or custom fabrication, this bung provides a precise, durable and reliable sensor port – or a securely sealed plug when not in use.
Technical Specifications
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Thread: M18 × 1.5 – standard size for most lambda / O2 sensors
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Weld Bung: approx. 37 g, Ø 30 mm – strong and stable construction
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Sealing Plug: approx. 30 g, SW17 – enables gas-tight sealing
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Copper Washer: approx. 2 g – ensures reliable and leak-free sealing
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Materials:
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Feature: built-in alignment step for perfect welding accuracy
Applications
Motorsport & Tuning:
Ideal for additional wideband or secondary O2 sensors used during ECU tuning, testing or performance optimization.
Custom Exhaust Fabrication:
Perfect for DIY exhaust builders and professionals who need an accurate sensor port or a future-ready test connection.
Diagnostics & Workshop Use:
Provides a secure measurement point even if no permanent lambda sensor is installed.
Your Benefits
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High flexibility: usable as sensor port or sealed test point
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Durable construction: steel bung, copper washer, zinc-coated plug
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Precise installation: alignment step ensures proper weld positioning
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Easy upgrades: ideal for modifications, custom builds and diagnostic setups
Why buy from us?
We supply motorsport-grade components built for performance and reliability. With expert knowledge and top-quality materials, we help professionals and enthusiasts achieve perfect results.
