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FAST 301108 XFI Main Wiring Harness, GM LS1/LS2/LS6/LS7
FAST 301108 XFI Main Wiring Harness, GM LS1/LS2/LS6/LS7

FAST 301108 XFI Main Wiring Harness, GM LS1/LS2/LS6/LS7

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FAST 301108 XFI Main Wiring Harness, GM LS1/LS2/LS6/LS7
FAST 301108 XFI Main Wiring Harness, GM LS1/LS2/LS6/LS7
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We estimate this item will ship on or before July 23rd.
Part # 282301108
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 3 business days for FAST Fuel Air Spark Technology to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.


GTIN Code:
MFG. Part #:


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 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
Some parts are not legal for use in California or other states with similar laws/regulations

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