Add to Cart Compare Quick view Holley Wiring Harness - Efi Digital Dash I/O Adapter 558-433 HOLLEY MSRP: Now: $307.59 Was: Gauge Wiring Harness - EFI Digital Dash - Kit MSRP: Now: $307.59 Was: Add to Cart Compare Quick view Qty in Cart: 0 Quantity: Decrease Quantity of Holley Wiring Harness - Efi Digital Dash I/O Adapter 558-433 Increase Quantity of Holley Wiring Harness - Efi Digital Dash I/O Adapter 558-433 Price: MSRP: Now: $307.59 Was: Subtotal: Add to Cart