i been seeing alot of this, Dyno Tuning, in my searches. i know that the dyno machine figures out max hp and stuff, but the whole dyno tuning thing is new to me. Or then again, i am new to it. i tried searching, but nothing. how does this work? and about what would be the average hp gain from doing this? and $$$

97hondaaccordlx
AEM CAI
Hi-flow Cat
Straight thru muffler
bosch plat4 plugs
bosch wires