Well, they've had their setups for 2 years now and haven't blown one motor! They run 13 lbs daily on an f-max kit. I guess you get what you pay for! They've also done a little tuning on a v-afc, but like i said, no dyno time! I personally think this kit is the best out right now! Comes with almost everything you need to bolt in! As with most kits you need a couple things hear and there... But overall it's pretty impressive!