Earls GM LT Gen-V Oil Pressure Adapter Fitting

Fits GM LT Gen-V engines (2014 & up), M12 x 1.75 w/ Tapered Seat to 1/8" NPT Female Port - Stainless Steel


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$6.26   Holleydays Price
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Replaces GM # 11546665


These Special Plugs and adapters are needed when you remove the vacuum pump on the GM LT Gen-V - 2014 & up engines. When the vacuum pump is removed, it exposes two passages in the oil galley. These passages are metric straight threads and they need to be plugged, or used for an oil pressure gauge, or pressure sensor w/ the Holley EFI system (i.e. Avenger, Terminator X, HP, or Dominator - Use Pressure Sensor 554-103 available separately or in Kit LT0004ERL).


  • Vacuum Pump Delete Adapters & Plugs for GM LT Gen-V
  • Material: Stainless Steel
  • Metric Thread Size in Block: M12 x 1.75 Straight Thread w/ Tapered Seat
  • (1) Adapter w/ Female 1/8” NPT Port
  • Ideal For Engine Swaps & Racing Applications that Don’t Use the OEM Vacuum Pump


Adapter NPT Size ( A )1/8 NPT FEMALE
Adapter TypeOil Pressure Adapter
Emission Code4
MaterialStainless Steel
Metric Thread ( B )12MM x 1.75
Product LinePremium
Product TypeGauge Adapter
Quantity Per Pkg.1
Part NumberLT0001ERL


This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Tech Resources

Replaces GM # 11546665


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