With rollers you will of course get the 'WOW' factor. Another point against rollers on the street is that they do self destruct and when they do it put little rollers into your engine. (Even the spendy ones can and do do this at times) Not a fun thing. I have run constant 11.40's with dips into the 11.30's with HD stock pressed type rockers in a fairly mild 360 in a Duster. Remember that there is a left and right rocker.