Technical FAQ v2.1
#17
Besides changes in colour options these are the model changes;
Mk1 99-01 the original and hardcore version apparently
Mk2 02-03 revised dampers and springs, glass rear screen, leather and a few other cosmetics (alloys, gearknob, console cover, trim to rear of headrest)
Mk3 04-05 Significant suspension revisions and facelift, retained the F20C but improved oil consumption (some how!) vtec transition smoother, dash display & clock, cosmetics (alloys, new centre console & radio door in silver, no black tape round windscreen, colour coded HID washers)
Mk4 +06 Drive by wire (DBW) introduced to allow fitment of traction control (VSA), minor dash display changes & outside temp, cosmetics (seat covers change and there is no hole in the headrest, roll hoops speakers, console in black & radio door cover in gunmetal)
Mk5 +08 VSA as standard, changes to springs & roll bars, different alloys, GT100 Limited Editions
Mk1 99-01 the original and hardcore version apparently
Mk2 02-03 revised dampers and springs, glass rear screen, leather and a few other cosmetics (alloys, gearknob, console cover, trim to rear of headrest)
Mk3 04-05 Significant suspension revisions and facelift, retained the F20C but improved oil consumption (some how!) vtec transition smoother, dash display & clock, cosmetics (alloys, new centre console & radio door in silver, no black tape round windscreen, colour coded HID washers)
Mk4 +06 Drive by wire (DBW) introduced to allow fitment of traction control (VSA), minor dash display changes & outside temp, cosmetics (seat covers change and there is no hole in the headrest, roll hoops speakers, console in black & radio door cover in gunmetal)
Mk5 +08 VSA as standard, changes to springs & roll bars, different alloys, GT100 Limited Editions