Originally posted by fujiwara takumi
3 levels of adjustability in VTEC down tuned for economy. less aggressive knobs. that 3 level bit may have been intro with the CVT later on in the 6th gen era though, im not sure.
First level runs up to 3000 RPMS, and the engine only uses three valves... 1 intake, 2 exhaust. Promotes better swirl and gives much better gas milage. Next two stages are conventional.