Posted 1/18/2020 21:49 (#7984651 - in reply to #7984639) Subject: RE: 9370R vs 9420R
SE ND
I tune them and the 8370R's up to 420HP max. Have never had an issue with them, but yes you are right. If you don't need the power on a 9420R, gearing up and idling back will certainly help but they will burn more fuel regardless if you compare them on the same sized applications.
9370R vs 9420R
