depends what you want it for really? what do you want it to show? - my SAFC shows Throttle posistion, RPM, Knock, Air Correction and other stuff, but thats a fuel controller so combining the two.......^dont get that one tho looks rubbish imo.. Apexi rev speed meter,...does what is says really...RPM, Speed, can also do a lot of timing like 0-100KPH, 0-400M etc... What i would get tho is a HKS CAMP 2...they is lush , but you need a screen in your car...