On the right is my new Earl's 41910 oil cooler. On the left is an Earl's 61908. Both are 19 row coolers but the one on right is longer and has -10 fittings. Currently installed on my car is a 16 row version of the cooler on the left. I'm expecting the new, larger cooler to bring my oil temperatures down well below the 250F level I'm seeing on the track now with the smaller cooler. Temps were pushing 275F before adding an oil cooler!