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  1. Engine Oil Coolers
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Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan, -8 AN Inlets - Class V

Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan, -8 AN Inlets - Class V

Our Price: $349.99
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Engine Oil Coolers
Shipping Weight: 14 lbs
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D15660 - 13W x 10T x 5-5/8D Inch Derale Stacked-Plate Cooler
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13" Wide x 10" tall x 5-5/8" deep, fan-mounted, remote cooler features the most efficient type of heat exchanger core, a stacked plate, and a 500-CFM, reversible tornado fan to ensure optimum airflow. 1-800-940-8924 to order Derale engine oil coolers part number D15660 or order online at Free expert support on all Derale products. Great prices and Fastest Shipping for Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan, -8 AN Inlets - Class V. Engine Oil Coolers reviews from real customers.
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  • Reviews (16)
  • Q & A (0)
  • Photos

Derale Engine Oil Coolers

  • Stacked-Plate Cooler
  • W/ Sandwich Adapter
  • With - 8 AN Inlets
  • Class V
  • Derale
  • 13W x 10T x 5-5/8D Inch

13" Wide x 10" tall x 5-5/8" deep, fan-mounted, remote cooler features the most efficient type of heat exchanger core, a stacked plate, and a 500-CFM, reversible tornado fan to ensure optimum airflow.


  • Improves performance and overall functioning of engine
  • Has super-efficient, stacked-plate cooler core for optimum heat transfer
    • Most efficient cooling system with the large surface area of the stacked plate design and turbulator technology
    • Furnace-brazed aluminum construction for great heat dissipation
  • Offers superior airflow with 500-CFM, reversible tornado fan
  • Designed with clear, anodized aluminum shroud for additional durability
  • Mounts anywhere with aluminum mounting brackets
  • Includes:
    • Complete cooler assembly
    • Universal thermostatic sandwich adapter and adapter plate provide external oil lines
    • Multiple sleeve nuts to ensure proper thread size
    • Aluminum AN fittings
    • Brass hose-barb adapters
    • 180-Degree, in-line thermostat for power-saving fan shut-off
    • OEM spec hose with stainless steel clamps
    • All necessary mounting hardware
  • Made in USA


  • Inlets: -8 AN
  • Adapters: -8 AN x 1/2" hose barb
  • Overall dimensions: 13" wide x 10" tall x 5-5/8" deep
  • Distance between inlets: 10"
  • Mounting dimensions: 7-1/2" wide x 9" tall
  • 1-Year warranty

Stacked-plate heat exchangers have long been considered the most effective type of oil or transmission coolers, primarily because of their increased surface area. Allowing fluid to spread out over this larger surface area decreases the time required for heat transfer to take place. As a result, plate coolers typically manage to cool a greater volume of fluid faster than tube-and-fin, or even plate-and-fin, varieties. Add to that a powerful tornado fan that ensures optimum airflow at all times, no matter the environment, and you have a super-efficient heat exchange unit.

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.


15660 Derale Hyper-Cool Remote Engine Oil Cooler with Installation Kit

Item # D15660

Installation Details D15660 Installation instructions

Customer Reviews

Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan, -8 AN Inlets - Class V - D15660

Average Customer Rating:  4.8 out of 5 stars   (16 Customer Reviews)

13" Wide x 10" tall x 5-5/8" deep, fan-mounted, remote cooler features the most efficient type of heat exchanger core, a stacked plate, and a 500-CFM, reversible tornado fan to ensure optimum airflow.


Love my engine oil cooler. I was having overheating problems with my Dodge truck while towing on a hot day. I asked the guys at etrailer if I should add a bigger radiator, and engine oil cooler or another tranny cooler. They nailed it when they recommended a supplemental engine oil cooler. I now can town my fifth wheel RV trailer on the hottest days and in the mountains without overheating. I do still have to watch the temps and if they start to get over 260 f or so I downshift a gear or two to get greater fluid flows. The only reason I am not giving this 5 stars is that with the supplied hose clamps I was plagued with constant slow leaks. I finally bought a much higher end hose Clamp which did solve the problem.


I was surprised at the lack of feedback on these products, and the differences in opinions. I tow a fare amount, between 7000lbs and 9500lbs. My vehicle is a 2013 Dodge Ram 1500 with the 8 speed transmission. ( outside temperature 20-30 deg Celsius ). Before I installed this engine cooler my temperature ran around 115 deg Celsius on a flat pull and 130 - 135 deg Celsius on most hills. After a hill it took a long time to drop in temperature, most time it hardly dropped. Now I rarely see 115 deg Celsius on a hill, and recovers to 100 deg Celsius very quickly. So in short I'm very happy with this product. I would recommend it to anyone that Tows.


Arrived today. need to find time to install. Looks great. box was untaped but I think everything is here. It looks like a quality product. Excellent so far!


Easy install very high quality product.


Awesome product! Received it yesterday. Custom fabricated brackets for it to mount below my auxiliary trans cooler on my 07 fx4 f150. Installed the on off switch on out side of transmission and the fan works great!


Awesome remote transmission oil cooler. Attached at the rear under belly of a Toyota FJ Cruiser, 2007.


I was very impressed on quality and ruggedness. Its heavy and works great. This is a must in South Texas especially pulling a trail.


excellent quality product, I have intalled the fan/cooler on a toyota highlander 2010 without tow package not infront of the a/c radiator but exactly at the same place as toyota install the oem transmission cooler just behind the right fog light. I have a travel trailer of 3300 lbs dry, (4000lbs gross weight) and before my transmission temperature was around 215-220 F with a standard transmission cooler(without a fan) infront of the a/c radiator, but now with my new derale fan cooler, its around 180F after a long climb. I am totally satisfied. I had to build a bracket to fit the cooler in this tiny space behind the fog light, it took me 6-7 hours .


Excellent product, quality parts and fittings for multiple installation platforms. Took about 4 hours to install but was a custom install under bed of truck.


Mounted between fuel tank and transfer case. Larger 6.0 cooler would go in front of intercooler. Dont need anymore heat there. This was cheaper and works great in this position. Wrapped exhaust near the lines as they have to dump out on right side of trans. and I did not want any hard 90 degree turns with all this extra plumbing. Keeps temps way lower. Also installed oversize/cooler pan.
FYI using temp sensors in pan and in valve body. Pan is regularly 30 degrees cooler than valve body.


Appears to be well-built and wasn't too hard to plumb in series with the existing oil cooler. Unfortunately with my 2010 Suburban it did not make any difference in the oil sump temperature shown by the computer - either daily driving or while towing. I plan on borrowing a laser thermometer to see what the actual input/output temps are.


Great product. Keeps transmission oil cool. Happy with my purchase


Nice product


Easy install, and works as specified. Would put on future high performance vehicles


Have not installed it yet, but looks impressive! This this is like a beast cooler. Will be installing it this week before a long distance rv trip.


Great product and prices really awesome service


See what our Experts say about this Derale Engine Oil Coolers

  • Will Adding an Engine oil Cooler Reduce Engine Temperature on a 2004 Chevy Silverado
    Cooling the oil might have a small effect on the overall temperature of the engine as a whole, but it will not be very much. If the truck is running hot, there could be a problem with the thermostat. If that checks out, you may need to add additional fans for more airflow. I have included a link to our fan main page and some FAQ articles for you to view. But, that is not to say that adding an engine oil cooler is not necessary or is a bad idea. I think it will help to extend the life of...
    view full answer...
  • Will the Derale Remote Engine Cooler Fan # D15660 fit 2003 Ford Focus 5 door SVT 2,0 Liter Engine
    Yes, the Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan # D15660 has an adapter in it that is compatible with the oil filter threads you have on your 2003 Ford Focus, 3/4-16.
    view full answer...
  • Will Derale Hyper-Cool Fit 2022 Ram 2500 and Keep Oil Cooler
    The Derale Hyper-Cool Remote Engine Cooler Kit # D15660 will definitely help keep the oil cool in your 2022 Ram 2500. This is the most efficient cooling system with the large surface area of the stacked plate design and turbulator technology. It will work on your truck as long as you have the space for it, more than likely you do. It measures 13" wide x 10" tall x 5-5/8" deep.
    view full answer...
  • Can a Remote Engine Oil Cooler be Installed on a 2005 Ford F-150
    Engine oil coolers are not vehicle specific so you can install one provided you have enough space under the hood to mount it in your 2005 Ford F-150 AND the kit comes with the correct fittings. A remote cooler like # D15660 that you referenced has an advantage because it contains its own fan so it can be mounted it alternative locations that other coolers cannot go. This kit comes with a universal thermostatic sandwich adapter and multiple sleeve nuts to ensure the proper thread size....
    view full answer...
  • Recommended Remote Engine Oil Cooler for a 2005 Chevrolet Silverado 2500HD
    The remote mounted engine oil cooler I recommend for your 2005 Chevrolet Silverado 2500HD is the Derale Hyper-Cool Remote Engine Cooler Kit part # D15660. This is an excellent option that will keep the engine oil cool when towing through the mountains. The kit comes with everything you need and has a 12 volt electric fan which will work even when stationary or when airflow is limited. The kit comes with a few different adapters but you will need to use the one with the blue/red paint marking....
    view full answer...
  • Can Derale Hyper-Cool Oil Cooler D15660 Be Installed With Inlet/Outlet Fittings Pointing Sideways?
    The Derale Hyper-Cool Oil Cooler # D15660 can be installed with the oil inlet/outlet fittings pointed any direction you need to fit your vehicle. Oil pressure from your vehicle pushes the oil through this cooler so orientation will not matter.
    view full answer...
  • How Much Extra Fluid is Needed for Class V Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan
    For whatever reason Derale likes to keep that a secret - they say that since coolant will be lost during install they don't have a number. With that being said, we have found that the Class III Series 8000 # D13503 will hold about 5-1/2 to 6 ounces so since the cooler that comes with the Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan # D15660 you're looking at has similar dimensions I'd say you can anticipate about the same.
    view full answer...
  • Recommended Engine Oil Cooler for a 2013 Ram 1500 with 5.7L V8 Engine
    Yes, the Derale Hyper-Cool Remote Engine Cooler Kit part # D15660 will fit your 2013 Ram 1500 with the 5.7L v8 engine. In order to install this oil cooler you will need to use the included adapter with the green paint marking. The Derale Hyper-Cool will do an excellent job of providing you with reduced engine oil temperatures. These reduced engine oil temperatures will be especially important when towing a heavy trailer as engine oil temperatures increase while under load which then leads...
    view full answer...
  • Which is More Helpful When Towing: Engine Oil Cooler or Transmission Fluid Cooler
    Transmission cooler is definitely more important than an engine oil cooler. Most modern vehicles have cooling systems that are very efficient and an engine oil cooler is not needed at all. In some cases they actually will slightly lower oil pressure so they really aren't recommended. Transmission coolers do help a ton to preserve the life of a transmission so we recommend them highly. Basically you can't over cool transmission fluid and the cooler it stays the longer the transmission lasts....
    view full answer...
  • Engine Oil Cooler Mounting Location Options for a 1994 Chevy Camaro
    I own a 1998 Pontiac Trans Am and have a very large transmission cooler plus an underhood ram-air kit (Fast Toys Ram Air) that blocks about 50% of the direct air flow that would go through the radiator and I have had no cooling problems. The cooling fans on our F-body cars are very powerful for cooling the radiator fluid and you should not have a problem with airflow through the radiator. Also, our bottom breather style radiators are very efficient. You will notice that most modern cars...
    view full answer...
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  • BTU Rating of Derale Engine Oil Coolers
    I checked with Derale and they do not list the BTU rating for the part # D15660 that you referenced. However, there is a very similar kit that uses a more efficient style of heat exchanger that they do list the BTU rating for. The cooler in this kit has a BTU rating of 45,000. This cooler uses a plate fin cooler which is the most efficient style available. This cooler is also similar in size to the kit you referenced.
    view full answer...
  • Recommended Transmission Cooler for 2018 Ford Explorer
    The transmission cooler I recommend for a 2018 Ford Explorer is the Derale Series 8000 Plate-Fin Transmission Cooler Kit part # D13504 which is a complete kit that comes with everything needed for installation. This is a class iv cooler that measures 11" wide x 12" tall x 7/8" deep so as long as you have this much space in front of the cooler there will be no fit issues. The cooler will do a great job of keeping transmission fluid temperatures down which extends the lift of the transmission...
    view full answer...
  • Are Engine Oil Coolers Fits for 2017 Subaru Outback
    Engine oil coolers can fit any vehicle so long as there is room for it to install. So the best oil cooler, the Derale Hyper-Cool Remote Engine Cooler Kit # D15660 measures 13" wide x 10" tall x 5-5/8" deep so you'd need that much room in your 2017 Subaru Outback. The larger the cooler, the better the cooling, so if you can fit this cooler in I recommend it, otherwise there is the 9-7/8" wide x 9-1/2" tall x 1-1/4" deep Engine Oil Cooler Kit # D15405 you mentioned which is also a very...
    view full answer...
    Image 1 for
  • Efficient Engine Oil Cooler on 2014 Ram 1500 5.7L
    A stacked plate cooler is going to be the most efficient cooler and they're usually smaller giving you more options on installation. In addition, a cooler that includes a fan, like # D15660, can be installed anywhere in the engine compartment since it provides its own air flow. For another option that does not include a fan, # D15605 is our most popular stacked-plate cooler. It will need to installed in a location that provides the most amount of airflow possible. Preferably in front...
    view full answer...
  • Does Derale Hyper-Cool Remote Engine Cooler Kit Come with Relocation Kit for Oil Filter
    The Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan # D15660, like most other coolers, is actually a universal fit so you just need to make sure that you have enough room in your engine bay to ensure that it will fit on your 2008 Ford F-250. This cooler has overall dimensions of 13" wide x 10" tall x 5-5/8" deep and then has mounting dimensions of 7-1/2" wide x 9" tall (see attached). While this kit doesn't come with a relocation kit, you can easily add one with part # D15748 and then...
    view full answer...
    Image 1 for
  • Engine Oil Cooler Recommendation for Truck that Overheats While Towing Fifth Wheel
    Your problem would be best solved by a remote engine oil cooler. Since your engine is overheating first that would indicate that the problem is there and not in the transmission fluid. The Derale Atomic Remote Engine Cooler part # D15450 would be a great option. This will drastically cool the engine oil temperature so that your radiator fluid will be lowered considerably which will then allow your transmission fluid to stay a bit cooler as well. Since this cooler has a fan attached to...
    view full answer...
  • Recommended Transmission Cooler Rubber Hose Diameter for a 2010 GMC Yukon with the 5.3L V8 Engine
    Yes, the -6 AN fitting on the Derale Hyper-Cool Remote Transmission Cooler Kit w/ Fan part # D13960 will work for your 2010 GMC Yukon with the 5.3L V8 engine. This cooler has a -6 AN x 3/8" hose barb fitting that will adapt the -6 AN for use with a 3/8" diameter rubber hose. The Derale Hyper-Cool Remote Engine Cooler Kit part # D15660 has a -8 AN x 1/2" hose barb fitting that will adapt the -8 AN for use with a 1/2" diameter rubber hose. Keep in mind that this kit is designed to cool...
    view full answer...
  • Recommended Oil & Transmission Coolers for 2007 Chevrolet Avalanche Towing Trailer in Hilly Areas
    Towing places an extra heat burden on both your engine and transmission. Adding a supplementary cooler (or coolers) can take some of this extra stress off the tow vehicle and give you fewer worries as you tow, especially when you're in mountainous areas where there are long slow climbs without a lot of air flow to cool things down. For an oil cooler that will reduce your engine's operating temperature no matter what your actual driving speed is, I suggest a powered cooler that will cool...
    view full answer...
  • Oil and Transmission Cooler Recommendation for 2014 Toyota FJ Cruiser For Off-Road Racing
    Since you want to cool both engine oil and transmission fluid for a demanding off-road racing application I suggest you go with two separate coolers rather than a dual-core combination cooler. My contact at Derale confirmed the best options for your FJ Cruiser are their # D13960 Class V fan-powered Hyper-Cool Remote Transmission Cooler and their # D15660 Hyper-Cool Remote Engine Cooler. Derale runs their own off-road racing events and my technical contact was very clear that for your...
    view full answer...
  • Best Engine Oil Cooler for a 1998 Jeep Cherokee 4.0 I6
    The best engine oil cooler for your 1998 Jeep Cherokee 4.0 I6 will be the largest one you have space for in front of your radiator behind your grill as this will provide the cooler with the most airflow which will in turn create the best performance. You will want to measure this space prior to purchasing a cooler. If you have space, I recommend using the Derale Tube-Fin Engine Oil Cooler Kit w/ Sandwich Adapter part # D15502. This engine oil cooler kit has everything you will need for...
    view full answer...
  • Remote Mounted Engine Cooler w/ Remote Oil Filter Mount for 2002 Ram 2500 5.9L Gas Engine
    If the excessive heat is indeed what's causing your 5.9 magnum to burn oil (good compression could back that up) then yes, an oil cooler would indeed help in your situation. There are two ways to tap into the oil system for a cooler, a sandwich adapter which fits in between the filter and the filter landing on the vehicle or a remote mount which has a spin-on adapter that installs at the filter landing and features a remote mount that allows you to install the filter elsewhere, such as...
    view full answer...
  • What is Difference Between Stacked Plate Remote Derale Transmission Coolers 15660,15860 and 15960
    So the reason the part # D15660 is the most expensive is because it comes with everything needed to install as a engine oil cooler kit since it has multiple fittings as well as the sandwich adapter. This is basically the complete kit. Next up is the # D15960 which setup to be a transmission cooler and comes with the fittings needed for this application which is considerably less than as an engine oil cooler. Finally the # D15860 comes with minimal fittings and adapters and would require...
    view full answer...
  • Recommended Coolers with Remote Location Installation for Jeep Cherokee XJ
    The Derale Hyper-Cool Remote Engine Cooler Kit w/ Fan # D15660 for oil cooling can be mounted anywhere you have the space in your Jeep Cherokee XJ. The unit will be 13 x 10 x 5-5/8 inches total, so you simply need that space. The remote location with fan will allow mounting in any location with that space allotment as opposed to in front of or behind the radiator if a fan were not present. If you want a transmission cooler, I recommend the Derale Hyper-Cool Remote Transmission Cooler...
    view full answer...
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  • Correct Replacement Thermostat for Derale Hyper-Cool Remote Transmission Cooler Kits
    The correct replacement thermostat for the Derale Hyper-Cool Remote Transmission Cooler Kits like part # D13960 or part # D15660 is the Replacement Thermostat for Derale Fan Controls part # D16728. The thermostat has spade connections on one end where the wires go so carefully pull the wires off this end by the connector and then thread the old thermostat out. The replacement can then simply be installed in reverse order.
    view full answer...

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