but what would answer your question with testing derrick? if its stock, it wont be different, if its high hp it wont be different. thats my point/question, what would answer this? put them in 20 1000+ hp trucks with spray an see if they all live? its so hard to know. you just have to put some faith into it, many of these parts are faith based, thats why people choose to do business with some of these comapnies. because they have delievered what they say it will do. now if a few sets of these fail, like quick, we all know. like tadd said, its re engineered, to give us a better chance of having the pistons live.