Originally Posted by kawzak
Where does the crack happen at? I can weld any steel and stainless. Is it a support problem-or stress from expansion/contraction? Or is it "better to get an updated header" thing?
it's an expansion/contraction thing. cracks usually occur at the collector where there is the most leverage from the head expanding/contracting.
the best idea is to convert to a late model style cast manifold. you can grab the two piece-cast manifolds off an 00-01 XJ or WJ, then use Walker Exhaust #52317 to adapt it to your cat.