Magnum Valves

Anybody use these valves? I've used SI Valves in the past with good results, but these look pretty good.

http://www.ebay.com/itm/MOPAR-Dodge...-valves-100-/381464648862?hash=item58d1109c9e

SI's product, is fantastic, personal knowledge & use : by myself & ex boss. They will treat you ,well..