2-1/16" CAN-Bus Boost/Vac Gauge 30inhg-0-30 psi (w/ warning) - Holley EFI sku_dd-link 0m9ln58fn2t SKU: FHO2-BV4-HLY $173.80
2-1/16" CAN-Bus Boost/Vac Gauge 30inhg-0-30 psi (w/ warning) - Holley EFI FHO2-BV4-HLY ⚠️ Requires Holley EFI Gauge Module (Part 554-130) for ECU connection (View on Holley.com) Designed for seamless integration with Holley EFI systems when using the Holley EFI Gauge Module, the Speedhut Boost/Vac Gauge pulls real-time data... $173.80