Holley EFI 558-433 Engine Control Module Wiring Harness

Provides ten addiitonal inputs/outputs to the 7" digital dash Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units Item includes USB memory stick to update digital dash firmware that supports adapterYou may also like Holley EFI 550-657 Dominator EFI Kit - LS1 Main Harness with Trans Control, DBW, and EV1 Injector Harness.