I have to agree that the Isspro gauges match up very nice and are faster reacting than the Dipricol-----------I switched from the Dipricol to the Isspro and yes I had problems with the lighting on the Dipricol EGT gauge. I am very pleased with the new Isspro gauges and the only thing you have to hook up 2 small AMP boxes---1 for transmission gauge and the other for the EGT gauge.
Jim
Jim