How does It work?

This O2 Sensor Spacer works on competitive racing vehicles by moving the post-cat oxygen sensor out of the direct exhaust flow. It effectively reduces the amount of exhaust gas exposed to the oxygen sensors tip to that of a normal production street vehicle. This O2 Sensor Spacer usually clears the p0420 and p0430 check engine light codes (cel) 95.9% of the time., if the p0420 or p0430 cel is illuminated the engine control unit (ECU) will put the vehicle into “limp mode” (safe mode) resulting in poor performance and gas mileage, not to mention it’s pretty annoying seeing that check engine light on all the time.

O2 Sensor Spacers are only installed on the post cat (rear) oxygen sensors usually located at or slightly past the catalytic converter. Vehicles have either one or two post-cat oxygen sensors and an o2 simulator should be installed on each post-cat sensor to remove p0420 and p0430 and check engine light codes for a bad or missing catalytic converter.

FITMENT, will it fit my vehicle? 

This O2 Sensor Spacer is threaded 18mm x 1.5 which is the size of 99% of vehicles produced. Check your owner’s manual, and performance data or just crawl up under there, locate the post-cat sensor and put a 7/8 inch or 22mm wrench on the hex portion of the oxygen sensor if the wrench fits then you have 18mm x 1.5 threads. Correct fitment is your responsibility, please take the time to check.

Clearance, how much room is needed for installation?

The only issue for clearance is the length of the O2 Sensor Spacer and Oxygen Sensor combined as measured from the exhaust pipe to the oxygen sensors wire tip. This length is 4.5 inches (115mm) so imagine your presently installed oxygen sensor is 2 inches longer than it is, that’s how much clearance you need to install this type of O2 Sensor Spacer. It is your responsibility to ensure there are no clearance issues.

How is the O2 Sensor Spacer Installed?

The O2 Sensor Spacer simply screws into your existing exhaust pipe using the same thread port where your post-cat sensor is located. Installation is easy, first, disconnect the oxygen sensor and unscrew it. Second, screw back in the O2 Sensor Spacer, then screw in the oxygen sensor, reconnect the oxygen sensor, and that’s it your done.

Please Note:

(1) This Does Not Fix A Defective O2 Sensor, Wiring or Heater Circuits.

(2) No…O2 Sensor Is Included In This Offer.

(3) Designed For Post Cat Sensor ONLY.

(4) Intended For Competitive Modified Exhaust Use Only.

(5) Do Not Use To Remove Cel Caused By Faulty Catalytic Converter!

(6) It is the buyer’s responsibility to check and verify Fitment and Clearance issues.