the on3 kit is made of the same material as the xs power kits are. and those crack at the turbo flange. the xs kit is a twin kit so in that cause the headers are totally separate like in my kit and they still were cracking.

do some search over at theturboforums.com

 

yeah the only on3 kit i would even consider is the 5.0 kit and thats only because its supposed to be coming with mild steel hot side now.