whats better J or X heads

QuickDart360 said
The headers that laysons carries flow well? I remember DVJ cuda had some on his tunnel rammed cuda and ran very well. I guess my question is are these about as good as the equal length type headers?

I would say may be to the flow. They are tubing headers and probably flow about as good or a little better than the 67-69 HP 340 manifolds. I was never a big fan of where they exit. Look "Spitfire" up in the search box. There's lots of threads and info about them.