I have the tuning from RR Diesel and love it.
I'm running the 120 tune full time and it's so amazing.
They don't recommend running the 150 or 200 without a new tranny and new head bolts.
Anyone out there doing it?
I really would like to put it on the 200 tune to see what it feels like but I'm not trying to break a tranny or blow a head gasket.
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