Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class V

Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class V

Item # D15405

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Engine Oil Coolers

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Ford Flex engine oil coolers from Derale. Expert engine oil coolers advice with thousands of helpful questions and answers. Derale reviews from other Flex owners. Guaranteed lowest price and fastest shipping.
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Derale Engine Oil Coolers - D15405

  • Plate-Fin Cooler
  • Class V
  • With - 8 AN Inlets
  • Derale
  • 9-7/8W x 9-1/2T x 1-1/4D Inch

9-7/8" Wide x 9-1/2" tall x 1-1/4" deep, highly efficient, plate-and-fin cooler comes with a sandwich adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve overall performance.


  • Prolongs life of engine oil, reducing number of necessary changes
  • Improves overall functioning and performance of engine
  • Reduces oil temperature by up to 50 degrees
  • Cools effectively through use of radiator-style, plate-fin heat-exchanger core
  • Provides external lines, via sandwich adapter, for simple installation of oil cooler without having to reposition oil filter
  • Includes:
    • Plate-and-fin cooler core
    • Sandwich adapter
    • High-temperature, high-pressure rubber hose with stainless steel clamps
    • Multiple sleeve nuts to ensure proper thread size
    • Complete mounting kit
  • Made in USA


  • Inlets: -8 AN
  • Cooler dimensions: 9-7/8" wide x 9-1/2" tall x 1-1/4" deep
  • Distance between inlets: 8-9/16"
  • Sandwich adapter:
    • Inlet/Outlet ports: 3/8" NPT
    • O-ring diameters: 2-3/4" and 3-1/2"
    • Engine filter thread size: 3/4"-16, 13/16"-16, 18 mm x 1.5 mm, 20 mm x 1.5 mm and 22 mm x 1.5 mm
  • 1-Year warranty

The sandwich adapter in this kit provides the external oil lines necessary to install a cooler without requiring you to move the factory spin-on oil filter, making it even easier to extend the life of your vehicle's engine. In addition, the thermostatic bypass feature allows oil cooler than 180 degrees to bypass the heat exchanger, so your engine will warm up faster.

The cooler used in this system is a highly efficient, radiator-style, plate-and-fin heat exchanger. In this system, finned chambers provide increased surface area for fluids to spread out while also continuously agitating them, resulting in superior heat transfer with minimum pressure drop.


15405 Derale Plate-Fin Engine Oil Cooler Kit with Sandwich Adapter, Type A

D15405 Installation InstructionsInstallation Details D15405 Installation instructions

Customer Reviews

Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class V - D15405

Average Customer Rating:  4.8 out of 5 stars   (6 Customer Reviews)

9-7/8" Wide x 9-1/2" tall x 1-1/4" deep, highly efficient, plate-and-fin cooler comes with a sandwich adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve overall performance.

- D15405

I put this in my 1981 Chevy C10. Toughest part was finding an oil filter that worked with the adapter but I did find one that worked just fine. I was concerned that my oil would be getting hot and I want to make my engine last a good long while so this was just a must. I can say after a long drive the oil entering the cooler is barely warm and the oil on exit is a little cooler than air temperature. This works perfectly and was not a problem to mount! 635897

- D15405

The oil cooler works great, but you will need to order more hose because the amount given is not enough, you cannot find it at ANY auto parts store so order it the first time 281601

- D15405

Great product quality, but the reason for the four stars and not five is because the hose barbs were miss packaged. I received four 3/8 NPT hose barbs but the two needed for the cooler are 1/2 NPT...a trip to Home Depot for the correct ones and $9.00 later was back in business. 400824


The oil lines began seeping on a long trip coating the radiator with oil. Had to add multiple hose clamps to get it stopped. When I got back home, I replaced the fittings and oil lines with JIC connections and hydraulic hoses [about $100] Problem solved forever. Still a nice package just better now with a quality cooler and adapter.

Kevin D - 07/01/2018


- D15405

just one problem the sandwich adapter will not fit on a 2008 Avalanche 4x4 the front drive shaft is in the way had to modify 254962

- D15405

Easy straight forward install seems to work well 193944

- D15405

Instructions were clear and installation was easy. Works great. Lower engine oil temps when towing. Shipping was quick too. 92244


Ask the Experts about this Derale Engine Oil Coolers

Do you have a question about this Engine Oil Cooler?

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  • The Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient # D13503 is a great choice for your 2015 Toyota Tacoma 4x4 with 4.0L V6 and the plate-fin is a good way to go. The internal turbulator agitate the fluid to facilitate heat transfer and prevent any undesirable drop in pressure. For your engine oil cooler, I recommend the Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class V # D15405. This is the...
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  • Does the ETBC7 Kit Include Wiring for a 12V Power Lead for Charging RV Battery
  • Yes, the Universal Installation Kit # ETBC7 includes a connector that plugs into the 4-Way flat on your 1998 Toyota Tacoma for basic lighting functions, as well as the wiring and hardware needed to get your 7-Way fully functioning. The 10 Gauge Duplex Wire includes 2 wires. One will be routed under the driver side dash and will carry the brake controller signal, like the Prodigy P3 # 90195, and the other will be routed to the battery on your Tacoma for a 12V Power pin on the 7-Way. I have...
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  • Oil Cooler for 2018 Subaru Forester with CVT Transmission & 2.5 L Engine
  • You definitely can add an oil cooler to your 2018 Subaru Forester without voiding the warranty as you are protected under the Federal Magnuson-Moss Warranty Act. The Act states that if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever modifications you have added to your vehicle actually caused the problem in question. The temperature of 240 degrees is actually pretty ideal especially for towing so you don't necessarily...
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  • Will Derale Plate-Fin Engine Oil Cooler Kit # D15405 Fit 2002 Ford Ranger
  • Yes, the Derale Plate-Fin Engine Oil Cooler Kit # D15405 that you referenced will work great on your 2002 Ford Ranger with the 4.0L V6 Engine. It includes the needed 22mm x 1.5mm sleeve nut adapter for the engine filter thread size on your Ranger. The included hose should be plenty long enough for installation on your truck. I have attached the written installation instructions that you can check out as well.
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  • Derale Plate-Fin Engine Oil Cooler Kit # D15451 Recommendation for a 2011 Dodge Ram 1500 4x4
  • This Derale Plate-Fin Engine Oil Cooler Kit # D15451 that you referenced will lower the engine oil temperatures of your 2011 Dodge Ram 1500 4x4. It is hard to say exactly how the temperature will decrease, but the more airflow the cooler will see the more the temperature will drop. If it would not drop to 180 degrees it would get pretty close. This # D15451 that you referenced does not have a thermostatic bypass. I would recommend you get a Derale Plate-Fin Engine Oil Cooler Kit # D15405...
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  • Best Engine Oil Cooler for 2015 Ram 1500 5.7 Liter
  • Both the Derale # D15405 and # D15602 are great options for your 2015 Ram 1500. Since engine oil coolers are not vehicle specific, either cooler will work well for you. The # D15602 is a stacked-plate design which generally cools faster and more efficiently, which is why it's able to be so much smaller. In terms of efficiency, the stacked-plate design is the best at cooling the engine oil. This oil cooler measures 13 inches wide by 4-9/16 inches tall by 2 inches deep. Since it's smaller...
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  • Oil Cooler and Combination Oil and Transmission Cooler Recommendations for a 2001 Chevy Silverado
  • On your 2001 Chevy Silverado, the o-ring diameter will either be 2-3/4 inches or 3-1/2 inches. Either way oil cooler kit # D15405 has both and will fit. It also comes with the proper filter thread size which will be 13/16-16, 18 mm x 1.5 mm, or 22 mm x 1.5 mm. Going with a combination cooler for oil and transmission fluid is not a bad idea. You could use # D15903 for GM applications or # D15902 which has multiple thread sizes. If more cooling is needed for each system you would want...
    view full answer...

  • Engine Oil Cooler Recommendation for a 2014 Ford F-150
  • I did some checking and the oil filter threads of your 2014 Ford F-150 are M22x1.5mm. The Derale Engine Oil Cooler part # D15405 comes with an adapter that would work with this thread size so it would work very well for you.
    view full answer...

  • Engine Oil Cooler Availability for 5.7 liter Hemi in Jeep Grand Cherokee
  • The Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter Multiple Threads # D15405 will work on your Dodge Hemi 5.7L engine. The Derale # D15405 engine oil cooler is a universal kit that has different engine oil filter sleeves. The sleeves allow you to mount the correct oil filter depending on your vehicle. Derale's application guide lists the oil filter thread size for 2004-2014 Dodge/Chrysler vehicles as 22 x 1.5 mm. That size sleeve is included in the Derale Engine...
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  • Recommended Cooler For A 1999 Jeep Cherokee
  • We currently sell two types of coolers for your 1999 Jeep Cherokee. You can either purchase an engine oil or transmission cooler for your Jeep. I recommend you choose the largest cooler you have space for. Generally speaking, the best place to install an aftermarket cooler is in front of the radiator/condenser behind the grill. For an engine oil cooler, I recommend the Derale Plate-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter part # D15405. The dimensions of this cooler are...
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  • PSI Pressure through the Sandwich Adapter and is Flow Lost in Engine Oil Cooler Kit # D15405
  • I spoke with my contact at Derale regarding the Engine Oil Cooler Kit, # D15405. He stated that typical pressure through the sandwich adapter on a vehicle at 3,500 RPM is 50 to 60 psi on a normal system and up to 90 on a high flow/high volume system. The adapter itself can easily manage that amount of pressure. He went on to state that any time a component like this is added to a system there will be some flow loss and oil pressure lost but with this system, it will be a minute loss...
    view full answer...

  • Oil Cooler Recommendations for a 2013 Ford Explorer with a 3.5 Liter
  • I did some checking and it looks like the oil filter threads on your 2013 Ford Explorer with a 3.5 liter engine are M22x1.5 mm, so you are going to need an oil cooler that is compatible with this. I would recommend you get the Derale Stacked-Plate Engine Oil Cooler Kit part # D15602. This kit comes with a compatible oil filter sandwich adapter so that it will work for you. This cooler is a stacked plate cooler, which of all the different styles of coolers this is the most efficient. Here...
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  • Tow Package Recommendation for a 2011 Ford Explorer
  • There are a few items I would recommend so that you can tow safely with your 2011 Ford Explorer. First let's start with a hitch. For that the Draw Tite Hitch part # 76034 would be an excellent choice. I attached an install video for you to check out. For ball mounts I recommend the etrailer Ball Mount Kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a carrying bag. For trailer wiring you will want the Curt Wiring Harness part # C56093. Your Explorer...
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  • Recommended Transmission Cooler And Oil Cooler For 2013 Ford F-150 EcoBoost 3.5L V6
  • For your 2013 Ford F-150 with 3.5L V6 EcoBoost, I recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient # D13503. This cooler has furnace-brazed aluminum construction and 3/4 inch turbulator plates for more efficient cooling. It comes with the complete mounting kit and measures 11 wide x 8-3/4 tall x 7/8 inches deep. This will give you more than enough room to also add an oil cooler. For your oil cooler, I recommend the Derale Plate-Fin...
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  • Recommended Engine Oil Cooler for 2015 Ram w/ 5.7L Engine
  • The Derale Engine Oil Cooler Kit you mentioned, part # D15405 would be an excellent choice that will reduce your engine oil temperature by up to 50 degrees. The kit provides the heat exchanger, hoses and a sandwich adapter compatible with the 22x1.5 filter landing of your 5.7L engine. I've linked you to our FAQ article about engine oil coolers, which I hope you'll find helpful.
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  • Oil Cooler for 1.9L Volkswagen Diesel Engine
  • Diesel engines in general operate at higher temperatures than gasoline engines. Gas engines have a typical oil temp of 200 - 250 degrees F, while diesel engine temps can reach as much as 600 degrees (!) within the cylinders. Your 1.9L Volkswagen diesel can be fitted with an oil cooler, according to my contact at Derale, as long as its oil pump is in good shape. Oil coolers are not vehicle-specific, nor fluid-specific; you can use as large and efficient a cooler as you have space to install...
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  • Engine Oil Cooler for a 2002 Toyota Tacoma with V6 Motor
  • Yes. You can install oil cooler # D15405 on your 2002 Toyota Tacoma V6. This kit does include the proper adapters/o-ring size for your motor. I have included a link to our guide to oil coolers for you.
    view full answer...

  • 2005 Chevy Avalanche Engine Oil and Transmission Cooler Recommendation
  • At the very least you would want the transmission cooler part # D13504 that you referenced. For towing situations a transmission cooler is always going to help prolong the life of the transmission. Typically for your truck an oil cooler is needed, but if your truck is getting pretty hot the part # D15405 would fit your truck and would help lower oil temperatures. It comes with the right threaded adapter for your truck as well. For the transmission cooler you will want the part # D13035...
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  • Recommended Transmission and Engine Oil Cooler for 2004 Chevrolet Avalanche
  • A Transmission Cooler like the Derale # D13504 referenced in your question will work to cool the transmission fluid in your 2004 Chevrolet Colorado. Doing this will help to extend the life of your transmission, as the vast majority of transmission failures are due to overheating. The unit is 11 inches wide x 12 inches tall x 7/8 inches deep, so you will just want to make sure you have enough space under the hood for installation. An Engine Oil Cooler on the other hand, such as the Derale...
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  • Recommended Components for 2002 Ford Escape Towing
  • The factory tow package included the trailer hitch, wiring harness although not fully connected, and engine oil cooler. All automatic Escape models have a transmission cooler as well. If you want to add a piece by piece towing ability, I recommend starting with the Draw-Tite Max-Frame 2" trailer hitch # 75118. Then add the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118343 which plugs into your factory wiring connections behind your tail lights. You will also...
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  • Which Provides More Engine Oil Cooling Derale Cooler D15405 or D15602
  • The Class V part # D15405 will provide considerable more cooling for your engine oil than the part # D15602 so it will be your best option.
    view full answer...

  • Transmission & Oil Coolers for 2015 Ford Explorer
  • To get your 2015 Ford Explorer ready for towing you can add both a transmission cooler and an oil cooler if you want. We offer individual coolers that can handle either oil or transmission fluid, and also 2-core combination coolers that can handle both. For an efficient Class III transmission cooler I recommend Derale's kit # D13503. I linked an installation video showing this being installed in an Explorer. You'll install this cooler on the transmission's existing return line where...
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  • Transmission and Oil Cooler Recommendations for 2007 Chevy Express 1500 With 4.3L Engine
  • Installing a transmission and an oil cooler is a excellent way to provide inexpensive protection for your engine and transmission. If you call your Chevy dealer and provide your VIN, they should be able to tell you if your Chevy Express was equipped with an oil cooler. Since it's a 1/2 ton van (1500 Series) I'd doubt it, but it would be good to check. Let's start with the transmission cooler. Since you won't be towing much weight, you won't need the biggest cooler available. I'd recommend...
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  • Will an Oil Cooler Kit Fit a 2013 Toyota Highlander with the 3.5L V6 Engine
  • Your 2013 Toyota Highlander with the 3.5L v6 engine uses a cartridge style oil filter which means the Derale Plate-Fin Engine Oil Cooler Kit part # D15405 will not work for you. With that being said, it is unlikely that you would need an oil cooler if you are within the towing capacity. In most newer vehicles, installing an engine oil cooler can have a negative impact as they actually cause a decrease in oil pressure. The decreased oil pressure is not drastic but does have more of an affect...
    view full answer...

  • Can 2004 Ford F-150 5.4L Tow in High Performance Mode with Edge Evolution Programmer EP15051
  • The Edge Evolution Programmer # EP15051 is a confirmed fit for your 2004 F-150 with 5.4L Triton V8 engine. The reason Edge does not recommend towing with the high performance tune installed is the risk of high engine temperatures. If you remain under 5K trailer weight and are not towing in the mountains you will be okay, according to my technical contact, so long as you keep a close eye on the engine temperature. You might want to consider installing an oil cooler like Derale Plate-Fin...
    view full answer...

  • Will Derale Combo Transmission and Engine Oil Cooler # D15903 Fit 2005 Chevy Silverado LT 5.3L V8
  • In normal conditions I think that the Derale Combination Transmission and Engine Oil Cooler, # D15903, would work fine for your 2005 Chevrolet Silverado, but since you mention the Mojave Desert, this is going to be a different story. With excessive desert temperatures, it is going to take quite a bit more to cool the transmission fluid and engine oil. In this case I would use 2 separate coolers and go with the largest ones possible. Of course you will want to take a measurement to see...
    view full answer...

  • Engine Oil Cooler Kit Recommendation for a 2006 Ford F150 with a 5.4 Liter Engine
  • I pulled up the dimensions of the oil filter on your 2006 Ford F150 with a 5.4 liter and you would be better off getting the Derale Plate-Fin Engine Oil Cooler kit part # D15405. The O-ring diameter of your filter will better match the adapter of this kit, this kit also has the thread adapter you need 22mm x 1.5mm and the cooler style of this kit is more efficient as it is a plate-fin style, whereas the # D15502 is a tube-fin style that has an o-ring adapter that would be too small. I...
    view full answer...

  • Recommended Oil Cooler Kit with Sandwich Adapter for 2002 Ford F-250
  • I'd recommend the Derale Plate-Fin Engine Oil Cooler Kit with Spin-On Adapter, # D15451. This kit comes with everything you need to install this cooler. It has the heat exchanger, a spin-on remote adapter, hoses, rings, etc. The plate-fin cooler gives you strength and efficiency. This oil cooler comes with a remote mount oil filter adapter, not the sandwich adapter. This allows you to mount the oil filter wherever you desire. However, if you are looking specifically for a sandwich...
    view full answer...

  • Recommended Supplemental Cooler for 2008 Jeep Wrangler
  • A transmission cooler is not necessary for a manual transmission equipped vehicle. Because a manual transmission lacks lines running from the transmission to the radiator, there is no place to tap in a cooler. However, you might benefit from an oil cooler. We offer an Oil Cooler Kit, part # D15405 that could reduce your engine oil temperature by up to 50 degrees. The included sandwich adapter is thermostatically controlled, only allowing the oil to run through the heat exchanger if the...
    view full answer...

  • Recommended Transmission/Oil Cooler for 2006 Ford F150 w/ 5.4L Engine
  • A combination oil/transmission cooler isn't a vehicle specific item. The best place to install a combo cooler is directly behind the grille in front of the radiator/AC compressor. You'll need to choose a cooler that will fit in the available space. I'd recommend the # D15902 kit which has a condenser that measures 17 x 12-1/2. Your 5.4L engine would need the # D13025 fitting kit, but everything else needed is included in the kit.
    view full answer...

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