Cascadia®On-Highway | 60,600 lbs. GCW350-600 HP | Up to 1850 lb-ft Torque New Cascadia®On-Highway | 60,600 lbs. GVW350-600 HP | Up to 2050 lb-ft Torque Cascadia® EvolutionOn-Highway | 80,000 lbs. GCW455-505 HP | Up to 1750 lb-ft Torque 108 SDSevere Duty | 69,000 lbs. GVWR200-380 HP | Up to 1250 lb-ft Torque 114 SDSevere Duty | 92,000 lbs. GVWR260-505 HP | Up to 1850 lb-ft Torque 122 SDOn Highway / Severe Duty | 210,000 lbs. GCW350-600 HP | Up to 2050 lb-ft Torque M2 106Medium Duty | 66,000 lbs. GVWR200-350 HP | Up to 1150 lb-ft Torque M2 112On-Highway | 80,000 lbs. GVWR260-505 HP | Up to 1850 lb-ft Torque