Thanks Botty, check with official Harley here, the bolts cost USD4.42, of course labour could be another USD20-25. saw the ARP bolt but can't find it here. my take on official harley, if after installed, it break (i hope not) say in 1,000km or even 5,000km, i can go back and claim against them. if i purchase the ARP and have outside mechanic install, and it breaks or loose or whatever, these outside mechanic will always has 1,000 answer why it break/loose and still not their fault !
unless anyone can just remove and insert the new bolts without knowing the torque, than i dun mind to DIY.