Holley EFI Transmission Harness - T-56 Magnum 558-480 automatic-transmissions-and-parts 74/8 V 1989 - 1991

74/8 V 1989 - 1991 Chevrolet R3500 4/8 V 1978 - 1980 Oldsmobile Cutlass 3

Different advance springs and stop bushings are supplied so you can choose from a variety of curves

Not compatible with Terminator X

Xpeditor WXLL (2006)

A cast 3" to quad 2

Holley EFI Transmission Harness - T-56 Magnum 558-480 automatic-transmissions-and-parts 74/8 V 1989 - 1991Terminator X Max ECUs on V3 Build 100 or later Holley EFI V6 Build 300 or later Features: Specs: Brand Holley EFI Connector Quantity 4 Emission Code 3 Harness Application GM Harness Type Transmission Product Type Transmission Harness Warning California Proposition 65 Application: Year Make Model Submodel