HFR Fabrication 304SS Weld-In O2 Saddle Bung – Built to Fit. Built to Last.

Take the guesswork out of sensor placement with the HFR Fabrication 304 Stainless Steel Weld-In O2 Saddle Bung—engineered for a flawless fit on round tubing and extreme durability in high-heat exhaust environments.

🔩 Precision-Machined from 304 Stainless Steel – Corrosion-resistant, high-strength, and ideal for high-temp exhaust systems.
🛠️ Saddle (Coped) Design – Pre-contoured to match standard exhaust tubing for an exact fit and clean, easy welds.
📏 Standard M18 x 1.5 Threads – Compatible with most O2 and wideband sensors, ensuring a secure, leak-free fit.
🔥 Ideal for Custom Exhausts, Turbo Builds, and Tuning Ports – Designed for performance, whether you're building on the street or the strip.
🇺🇸 Fabricator-Tested. Race-Proven. – Trusted by top builders and tuners who rely on quality and consistency.

Say goodbye to flat bungs and uneven welds—this saddle-style bung saves time, reduces prep work, and ensures a professional result every time.