I have the Green Diesel tune and very happy with it. I feel like they are more conservative and stay more within manufacturer specs so I don't have to worry about warranty issues. They have great customer service too.
I purchased the H&S oil cooler kit about a month ago. While pulling my 30' travel trailer I had to keep a close eye on the oil temp. Actually, I had to keep one eye on the road and the other on the oil temp! I looked at the D&J kit but I didn't like the fans, the thermostat or the looks of the...