One device cuts speed limit and additionally serves as speedometer signal converter (available separately from me). The speed signal for speedometer is user adjustable. Has LED indication of operating mode and input signal status. Firmware can be updated over USB.
Consider it as cheaper and improved variant of HKS SLD TypeII . Avaliable for 1UZ vvti, 3UZ 5A/T , 2JZ VVTI, 1JZ VVTI both turbo and n/a