Holley EFI GPS Speedometer - 553-121 calipers-and-parts satin black with machined fins

satin black with machined fins

The American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard

Aggressive

1 V8 2003 - 2007 Chevrolet Tahoe 294/4

Holley EFI GPS Speedometer - 553-121 calipers-and-parts satin black with machined finsOverview: Holley is pleased to announce the continuing evolution of its very successful analog style gauges with the release of new 3 3 8" and 4 1 2" speedometers and tachometers to complement our 2 1 16" gauge line. These are designed specifically for use with Holley EFI systems or as a standalone unit and available in both black and white face versions. These gauges are compatible with all Terminator, HP, Dominator, and Sniper ECU's, allowing them