4 個 M18X1.5 45 ミリメートル栓 O2 酸素センサースペーサーテストパイプ延長エクステンダーアダプター CEL

Having 420 code.Sprayed Cats down with SeaFoam.Didn’t get rid of 420 code but car ran better didn’t feel like it was dragging an anchor.Oxygen sensor spacers showed up put it on rear O2 Sensor Check Engine Light not coming on got emissions test passed and got new registration before the end of the Month and been over 2 weeks and no check engine light

It works perfectly

Work great

Works good

People complain about the product not working... It will not work if your Cat(s) is (are) clogged or if there is another underlying issue to begin with such as a defective upstream sensor or defective downstream sensor. Test your sensors as well people! its really not that difficult!