Klassickarguy
Newbie
Ive drilled them out with a 1/2 inch drill bit and the sensor still wont fit through it enough for me to screw them in. What size drill bit did you use, Im afraid to go much larger as I dont want to mess up the threads.I’ve always used the ones on eBay that come up when you search o2 spacer. Should be less than $10. They also make ones that have mini catalyst in them, but I’ve never tried them