we have plenty of success stories. alot of guys are tired of the constant bashing of how the product doesnt work so dont post any more. yet the naysayers cant help but keep shouting at the of their lungs. in terms of clamping down dissimilar metals and thermal expansion being an issue. thats an interesting point, but the mains are soaked in engine oil which really doesnt get much hotter than the coolant. not much thermal expansion in the 220 deg F range. these arent cylinder heads which see combustion temperatures. ultimately arp studs are made from 8740 chrome moly. for the guys that are cracking the studs maybe grade 8 isnt enough. i dont have enough feed back on this issue to see what power levels people are hitting where the studs crack.