I'll most likely be buying the collector somewhere else but what height collector do most people use for a ramhorn and shorty(mini-ram)? Also how does the collector height affect performance?

 

most ppl use 4" for ramhorn and topmount and a 3" for miniram due to the oil return line sitting to low with a 4". the 4" will flow slightly better than the 3". generaly the longer the collector the better it will flow.