XFI Main Harnesses for GM LS1, -2, -6, -7

Harness Part Number 301108: Harness will work with GM Gen III/IV LS1, LS2, LS3, LS6, LS7, etc. FAST XFI Main Harnesses feature clearly labeled wires and pre-terminated ends with Weather Pack connectors for a perfect fit to your application. Environmentally sealed and Weather Pack connectors were originally designed to be able to wIt'stand exposure to extreme temperatures, moisture, and harsh engine compartment fluids and chemicals. They are heavily used by OEM Automobile/Truck, Construction, Off-Road, and Farm Equipment manufactures due to their high quality and excellent fitment.

Sensors for Part Number 301108 Harness

Throttle Position Sensor (TPS)

• Part# 54020 - GM LS1 style Sensor
• Part# 307028 - GM LT1 style Sensor and Manifold Absolute Pressure (MAP)
• LS1 Style 1 Bar MAP Part# 307029 or other OEM Style LS1 MAP
• If using any of the below FAST MAP Sensors, Adaptor Harness Part# 308029 or Main Harness #301101 must be purchased:
• 1 Bar MAP (14. 5psi Max) Part# 307007
• 2 Bar MAP(29. 0 PSI Max) and Part# 307008
• 3 Bar MAP(43.5psi Max) and Part# 307009
• 5 Bar MAP(72. 5psi Max) and Part# 307047

Coolant Temp. Sensor (CTS)

• OEM Gen III/LS1 Style Coolant Temp. Sensor. will be required

Air Temp. Sensor (ATS)

• FAST Part# 307004

Idle Air Control (IAC)

• LS1 Part# 307059
• LT1 - Part# 307015