411 WORKS Stainless Steel Heat Sink O2 Bung

The 411 WORKS Stainless Steel Heat Sink O2 Bung is a precision-machined fabrication component designed for adding an oxygen sensor mounting point to compatible exhaust tubing. Machined in-house in the USA on HAAS CNC equipment, each bung is manufactured from high-quality Swedish 304L stainless steel for durability in demanding exhaust applications. The bung features an M18x1.5 thread and a coped mounting surface designed to accommodate exhaust tubing from 2.5 inches through 4 inches in diameter. Its heat sink design makes it a purpose-built option for custom exhaust fabrication where a secure O2 sensor mounting location is required. 304L Stainless Steel Construction: Machined from high-quality Swedish 304L stainless steel for durability in exhaust fabrication applications. M18x1.5 Thread: Features the common M18x1.5 thread size used by many oxygen sensors and wideband sensors. Heat Sink Design: Designed as a heat sink style O2 bung for custom exhaust fabrication applications. Coped Mounting Surface: Coped to accommodate tubing ranging from 2.5 inches to 4 inches in diameter. CNC-Machined Construction: Precision machined in-house using HAAS CNC equipment for consistent dimensions and quality. Made in the USA: Manufactured in-house by 411 WORKS using 304L stainless steel sourced from Sweden. What's Included (1) 411 WORKS Stainless Steel Heat Sink O2 Bung Vehicle Fitment Universal fabrication application Designed for compatible exhaust systems using 2.5" to 4" diameter tubing Compatible with O2 and wideband sensors using an M18x1.5 thread Final fitment depends on exhaust tubing diameter, sensor dimensions, placement, and available clearance Specifications Brand: 411 WORKS Product Type: Heat Sink O2 Sensor Bung Material: 304L Stainless Steel Material Origin: Sweden Thread Size: M18x1.5 Tube Compatibility: 2.5" to 4" Diameter Mounting Surface: Coped Manufacturing Process: CNC Machined CNC Equipment: HAAS Manufacturing Location: USA Fitment: Universal Important Notes Sold individually. This is a universal fabrication component and is not vehicle specific. Designed for tubing ranging from 2.5" to 4" in diameter. O2 sensor thread size is M18x1.5. Verify your oxygen sensor or wideband sensor thread size before ordering. Verify tubing diameter, sensor location, orientation, and available clearance before welding. Welding and fabrication are required for installation. Oxygen sensor or wideband sensor is not included. Proper sensor placement should follow the sensor manufacturer's installation requirements. Professional exhaust fabrication and welding are recommended. Why Choose 411 WORKS? 411 WORKS manufactures its fabrication components in-house using HAAS CNC equipment with an emphasis on precision, quality, and reliability. The Stainless Steel Heat Sink O2 Bung combines 304L stainless steel construction with an M18x1.5 thread and a coped profile designed for a wide range of common exhaust tubing sizes. For custom exhaust, turbo, and motorsport fabrication, it provides a purpose-built solution for integrating a compatible oxygen or wideband sensor into 2.5-inch through 4-inch exhaust tubing.