4.0L tech article.

[REDxj5150]

I found this pretty interesting to figure out results from all of those common 4.0L upgrades.

http://www.jpmagazine.com/techarticles/ ... index.html

I was most intrigued about the post 99' intake manifold. I wonder how much cam an engine would need in order for the 99' intake to do some good.