There is cams for both mds 6.4SRT8 and non mds cams for srt8 they are almost the same and both will perform basically the same if used in an engine without mds. You do not want to put a non mds cam in an engine with mds though. They were all rated at or near 485hp.

There is also a truck 6.4 cam that is a little smaller and it has mds and the whole engine is down about 75 hp because it has lower compression pistons, worse exhaust and the smaller cam. They came with mds in 2500 and 3500 rams.

The only one I am not sure about is in the trucks bigger than 1 ton, there may be a non mds cam for them.