Your shocks are too long and are bottoming out, bending the bolts and eventually breaking them....
Grab a new set of the correct length shocks next time you chew thru the bolts...
LMC part number 38-1695....KYB Gas...need two...$59.95 per shock...
30-0363 are the bolts need 2
30-0820 are the nuts need 2
30-0680 are the lock washer need 2
Hope this helps...
