HFR Fabrication 304SS Coped Weld-In O2 Bung – Precision Fit. Pro Performance.

Upgrade your exhaust build with confidence using the HFR Fabrication 304 Stainless Steel Coped Weld-In O2 Bung. Engineered for a perfect fit and long-lasting durability, this bung is the fabricator’s choice for clean installs and reliable sensor readings.

🛠️ Made from 304 Stainless Steel – Corrosion-resistant and built to withstand extreme heat and exhaust environments.
🔧 Coped Design for Tubing – Pre-contoured to fit standard exhaust tubing—no guesswork, no grinding. Just a clean weld every time.
📏 Standard O2 Sensor Threads (M18 x 1.5) – Compatible with most wideband and narrowband oxygen sensors.
🔥 Ideal for Custom Exhaust Systems, Turbo Builds, and Tuning Setups – Designed for performance vehicles, race applications, and professional fabrication.
🇺🇸 Proudly Machined by HFR Fabrication – Trusted by race teams, tuners, and builders who demand precision and quality.

Don't settle for flat bungs that require extra work and compromise weld quality. Save time in the shop and boost reliability on the road or track with HFR’s precision-coped solution.