Good set of washers. I have used them on my 2007 Escalade ESV 6.2 liter engine and I have to say they are top notch. If you've read up on oil pump O-rings, all I can say is read, read, read! Melling and a few others give you directions for two types of oil pump sensors, when in fact there are THREE types! I had the third or so-called conical type and someone mistakenly put a RED pad on it when it was supposed to be a thicker green one. The old one literally fell into my hands when I took it off. The bolt torque for my all-aluminum block car was 18 ft-lbs. Yours may vary.