Holley EFI 554-140 Computer Chip Programmer Input Cable

USB Connection for 553-109 & 553-106;

Have you been searching for a reason to discard your old noisy mechanical speedometer cable? If so, the Holley GPS Module for Holley's 7 in. Digital displays should be the next addition to your project vehicle. Featuring a simple plug and play installation, this GPS Module will allow you to display vehicle speed on your digital dash, without needing any external sensor information.;