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Are the oil coolers for the horizontal and vertical mount oil filters interchangeable?
My understanding is the filter mounts and coolers will all interchange but you should not use a 6B cooler on a 4B engine because it has more cooling plates and will result in the oil being too cold on a 4 B. I got a vertical mount from a 6B and installed it on my 4B cooler , no problem.
 
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