Kooks Headers Weld-On Oxygen Sensor Bungs

Kooks Headers Weld-On Oxygen Sensor Bungs are precision-engineered stainless steel fittings designed for custom exhaust fabrication, header installations, and high-performance exhaust builds. Manufactured 100% in the USA, these bungs deliver the same uncompromising quality that has made Kooks Headers a trusted name in performance exhaust since 1962.

Key Features:

• T304 aircraft-quality stainless steel construction — outstanding heat resistance, corrosion resistance, and long-term durability in demanding high-temperature exhaust environments
• Precision-machined threads for consistent thread engagement and a secure, leak-free seal that ensures accurate oxygen sensor readings
• Weld-on bung design — ideal for custom exhaust builds, header fabrication, downpipe repair, and OEM replacement or upgrade projects
• 100% Made in the USA — crafted to Kooks' exacting standards by a three-generation, family-owned American manufacturer
• Race-proven engineering — backed by the same expertise behind championships in NHRA, IHRA, NMCA, NMRA, NASCAR, and more
• Limited lifetime warranty to the original purchaser against defects in materials and workmanship

Proper oxygen sensor placement is essential for accurate air-fuel ratio monitoring and reliable engine management. Kooks Weld-On O2 Sensor Bungs provide a secure, correctly threaded mounting point — whether you're building a full custom exhaust system, repairing an existing setup, or fabricating high-performance headers from scratch.

Available in multiple configurations to suit a wide range of exhaust fabrication needs, these bungs are a trusted choice among professional builders, race teams, and performance enthusiasts. Select the correct variant for your specific application.