304 Stainless Steel Lambda / O2 Sensor Boss – M18 x 1.5

Our premium 304-grade stainless steel lambda sensor bosses are designed for custom exhaust systems, downpipe manufacturing and general automotive fabrication.

Manufactured from high-quality stainless steel, these bosses feature an M18 x 1.5 threaded connection and a precision-machined shoulder, making positioning and welding straightforward.

These are the same high-quality sensor bosses we use in our own stainless steel downpipes, offering excellent durability, corrosion resistance and weldability.

Ideal for professional fabricators and DIY enthusiasts looking for reliable components for custom exhaust projects.

Key Features

• Premium 304 Stainless Steel – Excellent strength, durability and corrosion resistance.
• M18 x 1.5 Thread – Designed to accommodate compatible lambda and oxygen sensors.
• Precision-Machined Shoulder – Allows for easy positioning and secure installation.
• Excellent Weldability – Ideal for TIG welding, delivering clean, professional results.
• Compact Design – Suitable for custom exhaust and downpipe fabrication.
• Proven Quality – The same sensor bosses used in our own custom-manufactured downpipes.

Technical Specifications

• Material: 304 Grade Stainless Steel
• Thread Size: M18 x 1.5
• Required Mounting Hole: 22mm
• Shoulder Diameter: 24.5mm
• Overall Depth: 13mm
• Application: Weld-In Lambda / O2 Sensor Boss

Suitable Applications

• Custom exhaust systems
• Stainless steel downpipe fabrication
• Lambda / O2 sensor installation
• Exhaust repairs and modifications
• General automotive fabrication

Whether you're manufacturing a complete exhaust system or adding a sensor mounting point to existing pipework, our 304 stainless steel lambda sensor bosses provide the quality and precision needed for a professional finish.