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Exhaust Straight O2 Sensor Defouler Spacer Adapter+3 Adjustable Flow Inserts

California's Prop 65 Warning: Click Here for Detail

The most restrictive part of any exhaust system is the catalytic converter. The stock catalytic converter is meant to filter the flow of exhaust gases to reduce the amount of harmful gases into the atmosphere. Because of this, lots of potential performance is restrained. High Flow Test Pipes eliminate the stock catalytic converter and reduce exhaust backpressure. The result brings out the vehicle’s performance potential by giving it a free high flowing exhaust system. However, after deleting the catalytic converter on a OBD2 Vehicle, you'll end up with a P0420 Check Engine Light. This Adjustable O2 Defouler will fix that issue. Install in between the Post Cat Sensor and the exhaust

  • Material: Stainless Steel
  • Thread Size: Universal Fit
  • Fits Most Standard O2 Sensors
  • 1/8", 1/4", 3/8" Inserts. 3 Different Sized Inserts to Adjust Exhaust Flow, Extends O2 Sensor by 1.4"
  • Keeps Check Engine Light off from P0420 Code While Using Decats
  • Comes with Snap Ring to Retain Inserts


  • Universal Fit

Remark: This is a universal product ONLY. There are no Guarantee for fitment, Check Engine Light and/or work on your specific application


Product Content:

  • 1 x O2 Sensor Defouler Kit
    Hardware If Any is Shown in the Picture Above

No Instruction, Professional Install Recommended

Manufacturer Part Number: BFC-ADT-O2OXY-RES
Interchange Part Number: BFC-ADT-O2OXY-RES
Other Part Number: BFC-ADT-O2OXY

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