There is a warranty for this out from DC. It covers the bolts and the catalytic converter. It a 8year/80,000 mile Some has said it was extend till 10year/120,000 but you need to call DC for that. If the Dealer say they don't know about thats BS, just call DC and tell them which dealership and they will call to info them about it. I had to have both replaced and both were free of charge. This should cover all the 2.5 and 4.0 in the YJ/TJ/XJ
"PAIN IS TEMPORARY, PRIDE IS FOREVER"