I know this was probably posted earlier in this thread but what would be the power gains on a rev up with the 5/16 spacer alone? then with the mrev2 added? with the mrev2 alone? Not sure if I should get just the spacer or both

 

Definitely get both. Mrev2 alone will give mid range gains, but hurt your peak hp, the spacer then gives you your peak hp back, hopefully with a few more!