i was wondering if someone could explain something to me.
my question is when purchasing for example a tomei neo-kit the reytec come pre programmed for all the upgrades included in the kit but how can that pre tune be trusted? is it acurate? how are the a/f ratios? i'm confused b/c i know that to have a properly functioning engine you need a good tune, and every engine is different so how can this "generic" tune be effective?
please explain
