Parts-TuningMACK R – 850 Hp engine and 12+2 gear transmission 1.38 September 4, 2020August 29, 2020 - Leave a Comment Cool 850 Hp engine and 12+2 gear transmission ONLY for Mack R Series by Harven Includes 2000 liters tank! Credits: GA071MA Download mod File File size mackupgrade 87 KB Share mod: