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Simplify engine swaps and performance builds on GM LT Gen-V engines (2014 & up) with Earl’s Oil Pressure Adapter & Plug Kit, designed for use when removing the OEM vacuum pump. Removing the vacuum pump exposes two passages in the oil galley, which can be plugged or used with an oil pressure gauge or Holley EFI pressure sensor (Avenger, Terminator X, HP, or Dominator). This kit provides multiple solutions, including a 1/8" NPT female adapter, plugs, or combined adapter & plug options, allowing flexible setup for your EFI system.
Constructed from high-quality stainless steel with a natural finish, these components provide reliable sealing and durability under high-performance conditions. Ideal for engine swaps, racing, or custom EFI setups, this kit ensures proper oil pressure monitoring and clean installation.
Features:
Plugs or adapts oil galley passages on GM LT Gen-V engines 2014 & up
Compatible with Holley EFI systems (Avenger, Terminator X, HP, Dominator)
Includes 1/8" NPT female adapter, plugs, and adapter & plug options
Metric 12MM x 1.75 threads for secure, leak-free fit
Stainless steel construction for strength and corrosion resistance
Supports oil pressure monitoring with Holley EFI Part # 554-103
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If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
