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

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  • Regular price $387.15

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 Weather Pack connectors were originally designed to be able to withstand 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
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 (29.0psi Max) Part# 307008
3 Bar MAP (43.5psi Max) Part# 307009
5 Bar MAP (72.5psi Max) 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