I've been wrestling with OFH vs JDL for a while. From the threads I've read so far, there were some questions about the lack of flex joints in the OFH and whether that had an impact on longevity. I haven't found much more discussion on that so far. Maybe someone can provide some additional insight?
There's also some discussions about the OFH header flange not aligning with the overpipe causing exhaust leaks. I'm trying to find more threads about it, but the link below is the first I've found. I also remember seeing another thread about the pipe diameter between the OFH and stock overpipe. Something about the overpipe diameter being slightly smaller causing weird noises and exhaust to not flow as smoothly.
http://www.ft86club.com/forums/showp...&postcount=390