where in your post does it say you are comparing 1/2 spacer with 5/16??? you have to be clear in your posts or else you are giving out misinformation.

and i did post proof stating 1/2 gives gains over the stock configuration over all rpm ranges since you made the blanket comment that the 1/2 loses power low end which is simply not true.

 

Link? Info?

 

from what ive read motordyne 5/16 spacer will go you overall gains throughout rpms where as the 1/2 is only top end. i just bought a 1/2 motordyne and will be installing it this weekend. will follow up with a review.

kinda wish i had gotten the 5/16 but i got the 1/2 off another member for a pretty good deal so i jumped on it