553-106 Input output harness for Hol-ley EFI digital dash ^^ Hol-ley 553-106 7Digital Dash Input Output Harness will plug into the rear of the Holley digital dash. It is easy to use. ^^ 553106 Harness is ran with high quality copper wiring and comes with 12 colored wires, 53 in length and wrapped in loom. ^^ 553-106 Auto Input Output Harness can be used to run level, temp/pressure/travel sensors, virtual switches, high beam/turn signal indicators etc. ^^ Any question just contact us, we will reply you within 24H. And we offer a 12 month warranty.