
HOLLEYPART NUMBER: 510-558-481
558-481 GM F-Body T-56 Transmission Control Harness for use w/Terminator X Max ECUs on V3 Build 100, EFI V6 Build 300, or Later
$24295
4 left in stockT-56
Transmission Control HarnessFits GM F-Body T-56 Transmission Terminator X Max ECUs on V3 Build 100, EFI V6 Build 300, or Later Plug-and-Play Wire Terminals Fit:
- VSS (Vehicle Speed Sensor)
- Reverse Lockout Switch
- Reverse Light Switch
This Holley 558-481 Transmission Control Harness is a plug-and-play terminated harness to control the inputs and outputs on the GM F-Body T-56 Transmission.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeWiring Harness
BrandHOLLEY
Package Height4.0
Package Width9.45
Package Length12.3
Weight0.95 PG
TypePlug and Play
QuantitySold individually
Engine Management System Component TypeTransmission Control
Vendor Part Number558-481
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations



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