I have a trinity head with all hardware orings look to be in good shape but they are used, I would buy a new set before running just to be safe but its up to you if you want to run them. It comes with 3 sets of domes, one set was custom cut by lrd to a 19cc, the others are 18cc, and 15cc, one of the 15cc has a small nick in it but wont hurt anything. All hardware is included along with a new gasket shown in pix. I bought this off the hq a while ago and never used it, its just been sitting since i got it. I need a set of 35 or 36pwk's, open to offers let me know what you have.