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Stainless Bros O2 Sensor Bung SS304 Saddle Type (Round) - Cast

STB604-00100-4000
604-00100-4000
Bungs
Out of stock
$ 9.99

SKU: 604-00100-4000 


Stainless Bros O2 Sensor Bung SS304 Saddle Type (Round) - Cast

The Stainless Bros 604-00100-4000 SS304 Saddle Type O2 Sensor Bung is the best high-quality weld-in solution for adding oxygen sensor ports to custom exhaust systems, downpipes, or headers. This cast stainless steel round saddle bung provides precise 90-degree mounting, excellent weldability, and corrosion resistance for accurate AFR readings in high-temperature turbo, NA, or racing applications.

Key Features

  • SS304 Cast Construction: Durable stainless steel with superior corrosion resistance and heat tolerance
  • Saddle Type Design: Round saddle base for strong, leak-free welds on curved tubing
  • Standard M18x1.5 Thread: Compatible with most wideband and narrowband O2 sensors
  • Easy Welding: Thick cast body and saddle shape simplify alignment and welding

Specifications

Specification Detail
Part Number 604-00100-4000
Material 304 Stainless Steel (Cast)
Thread Size M18x1.5
Type Saddle (Round Base)
Mounting Angle 90-Degree
Finish Natural Stainless
Country of Origin United States
Warranty Limited

Product Notes

  • Single O2 sensor bung – weld-in design for custom exhaust fabrication

Installation Notes

  • Estimated time: 20-40 minutes, moderate difficulty, requires TIG welding
  • Cut hole in tubing, align saddle, TIG weld around base – ensure proper sensor orientation

This Part Fits

Application Notes
Universal Custom Exhaust Systems, Downpipes, Headers
Common Uses Wideband O2 Sensor Installation, Turbo Builds, Exhaust Fabrication

Why Choose Stainless Bros?

  • Specialist in high-quality stainless exhaust components and fittings
  • Precision cast SS304 saddle bungs for strong, leak-free welds
  • Trusted by fabricators for reliable performance in custom builds

Frequently Asked Questions

  • Q: Is this cast or welded?
    A: Cast stainless steel saddle bung for superior strength and weldability.
  • Q: What thread size?
    A: Standard M18x1.5 – fits most Bosch, AEM, Innovate wideband sensors.
  • Q: Can it be used for narrowband sensors?
    A: Yes, compatible with both narrowband and wideband O2 sensors.
  • Q: Is welding required?
    A: Yes, saddle bung must be TIG welded to exhaust tubing.

Shipping & Handling

  • Method: UPS/FedEx Ground
  • Availability: In stock, ships same or next business day
  • Packaging: Official Stainless Bros retail packaging

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