CARTEK Shift Lights

The CARTEK Shift Light contains 8 multi-coloured LEDs which form a programmable display sequence  designed to indicate to the driver the optimum time to shift up a gear to obtain maximum performance from their engine.
 
The device that will commence at an engine speed prior to optimum and complete at precisely the optimum speed thereby giving the driver early indication to shift up before the rev limiter is reached or engine damage occurs.
 
There are two versions, the Club and the OBD2. The Club os operated using engine signals direct to the indicator while the OBD2 is operated via CAN. Both of these are compatible with the HTG GCU. 

Instructions can be found HERE