yeah thanks those are a little less steap on the price but if you cant answer my question on if you no if there bad or not because of the noise in the heatercore than tell me you dont know any idiot can take the whole top of the engine apart and if im going to do that i want to no that im not waisting my time by tearing down a perfectly fine engine and yes i no what magnaflux is im not an idiot and have been doing engine work for some time now and have used many good machine shops basically if it aint broke dont fix it