Engine specs: Peak Torque: 2,550 Lbs-ft @ 1,000 – 1,400 RPM Peak Power: 765 HP @ 1,750 – 2,100 RPM Engine names: Caterpillar C18 765 Cummins ISX18 765 Cummins X18 Performance 765 Detroit DD18 765 Mack MP10 765C Volvo D18 765 10 speed name: Allison TC10 Custom 12 speed names: Eaton FO-25E3512F Custom Detroit DT12-OVX Custom mDRIVE ATO3512F Custom I-Shift ATO3512D Custom