[aumoore]

I have read the roller rockers add from nothing to about 30hp. My personal feeling is that they add more HP if you are running a high lift cam but on a stock engine they will only add a couple of HP. They did help my motor with a traick flow cam. They do make the engine run cooler.

Oh yeah I was watching speed channel last night and they said Motor referrs to electric or steam power but if you are producing power with fuel then it is a engine. The dictionary confirmed this.