Earl's Performance® 1178ERL - Thread Size Billet Oil Filter By-Pass Adapter

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In Stock (21) - Ships in 24 to 48 hrs
Custom Built / Racing
Fitment Notes:
  • Not Vehicle Specific. May require professional installation. Typically used with custom built or racing vehicles
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Product Details

Thread Size Billet Oil Filter By-Pass Adapter (1178ERL) by Earl's Performance®. Temp-A-Cure™ Coolers are manufactured with removable, interchangeable fittings that feature a contoured port side with an O-ring seal for worry free performance. You can stock your most common cooler cores and fittings, and mix and match to each customer’s needs. This means you can lower your inventory, increase customer service, and increase inventory turns all at the same time!


Brand: Earls
Center Stud Size: 3/4-16
Finish: Anodized Black
Material: Billet Aluminum
O-Ring Diameter: 2-3/4"
O-Ring Cross Section: .139"
Port Size: 1/2 NPT Female
Product Type: Oil Cooler


  • Made from Aircraft spec aluminum alloy using the latest vacuum brazing technology
  • Increase both thermal efficiency and mechanical strength
  • Manufactured from thin aluminum plates for fastest possible heat transfer
  • Inlet and outlet fittings seal with an o-ring to the top plate assembly for worry free performance.
  • Designed for the range of oil flows and air speeds encountered in high performance automobiles.
  • Available in three widths with inlet and outlet fittings male AN -6 to -16
  • Every cooler is pressure checked to 175 psi.
  • Periodic samples are burst tested to 350 psi.
  • Manufactured in the U.S.A.

EARL’S TEMP-A-CURE OIL COOLERS are designed to efficiently use all of the air that passes through them. The center chart below shows that a Temp-A Cure cooler of comparable size is between two and three times more efficient in terms of heat rejection as a typical tube and fin type cooler.

When driven hard for extended periods, the cooling system may prove less than adequate. Earl’s offers the solution to marginal cooling systems—race proven lightweight and efficient oil coolers designed to fit in the smallest practical space. Any performance vehicle can benefit from the TEMP-A-CURE difference. Tow vehicles, motor homes, passenger cars and even motorcycles can realize extended engine and/or transmission efficiency and life with an Earl’s TEMP-A-CURE oil cooler. mRacing cars have always required oil coolers. Since World War II, most racing cars, world wide, have utilized brazed aluminum “modular” oil coolers. The basic design of the modular oil cooler dates back to the early 1930s when it was developed for use with the Rolls Royce Merlin engine that powered the Spitfires and Hurricanes that won the Battle of Britain. This type of cooler with its internal turbulator plates and dense air fins provides maximum liquid side and air side surface area. The large collector tanks ensure minimum flow restriction. The fully brazed construction results in the most efficient possible thermal transfer path between liquid and air. All of this adds up to the most thermally efficient liquid-to-air heatexchanger available.

With many years of experience Earl’s Performance Plumbing can be rightfully called one of the major players in performance plumbing market. Right here in the USA Earl’s proudly manufactures the highest quality parts and accessories, which do the great job of transferring fluids through the vehicle in a safe and reliable way. The company's diverse product line includes an extensive choice of hose, hose ends and fittings, oil coolers, and other performance parts. Both serious racers and street performers can benefit from Earl's plumbing solutions. State-of-the-art equipment and precision CNC machining technologies allow the company to ensure the continued quality of its products.

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Warranty Information

All Holley Performance Products Limited Warranties are extended to the original consumer only. This Limited Warranty is not assignable or otherwise transferable. There are no warranties that extend beyond those stated herein. Holley Performance Products offers no other warranties expressed or implied beyond this Limited Warranty. In the event of an alleged defect in material or workmanship, for 90 days, Holley Performance Products’ responsibility is strictly limited to repair or replace the defective product. Holley has no other obligation expressed or implied. Final warranty determination will be in the sole discretion of Holley Performance Products. Holley shall not be responsible for; (a) actual or alleged labor, transportation, or other incidental charges; or (b) actual or alleged consequential or other damages incurred by use of any product of Holley Performance Products.

To initiate the warranty process, the consumer must return the alleged defective product to the place of purchase with a dated receipt and completed applicable warranty claim tag. Warranty claims will be rejected if the date of purchase cannot be established by the consumer. Do not send products directly to Holley Performance Products. Holley Performance Products assumes no responsibility for products sent directly to Holley Performance Products.

This Limited Warranty sets forth specific legal rights. The consumer may have other rights as a result of variations in state laws or provincial laws. This Limited Warranty supersedes all prior warranty statements.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is universal
  • Not Vehicle Specific. May require professional installation. Typically used with custom built or racing vehicles

Product Reviews


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Earl's Performance® - Thread Size Billet Oil Filter By-Pass Adapter
Earl's Performance® 1178ERL - Thread Size Billet Oil Filter By-Pass Adapter
Average Rating: 5 of 5
5 of 5
Excellent Choice!
Bought it on CARiD just as an experiment, and was greatly surprised in a good sense of course. The material is much better then the cast, good, constant, unrestricted flow. As for the price it is rather democratical if you take to consideration overall quality of the adapter. The shipping was fast.
Posted by (Cherry Hill, NJ) / 2001 Chevy Blazer
Was this review helpful for you? Yes
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