[EcHo]

ya stock is the best i know of. my friend and i would race, mine stock, his had k&n.we would also switch with same results. i would be about 1 to 1.5 truck lengths at 60 with stock, then he would start catching me between 60-70, be neck and neck between 70-75, then he would pass me around mid 70s. needless you will be much slower on low end up until the 60's so unless you like to race people starting at 60-100 it is pointless

this was at sea level however, if it was at a higher altitude the story could be much different