Product Description
Be careful when purchasing O2 extenders. Some are sold without being drilled out 1/2 inch. If you O2 sensor is not drilled out 1/2″ your check engine light will not go off and any gains will be nullified. Our O2 extenders are drilled out 1/2 inch.
For sale are two 18mm O2 sensor Extenders that backs the O2 sensor back out of the exhaust pipe 3/4″ so that your HHO unit will produse the desired MPG gains on your vehicle. This also will turn OUT the check engine light… More >>
