I thought this was an interesting article since I have been running steel roller rockers in my performance applications for many years, having experienced my own failures (caught early) and seen first hand others (even Jesels) aluminum rocker failures due to fatigue.
http://garage.grumpysperformance.co...rockers-which-is-best-steel-or-aluminum.3124/
http://garage.grumpysperformance.co...rockers-which-is-best-steel-or-aluminum.3124/