ZZ4187M3517N1 Howo a7 tractor head was designed to suit all condition and all loads. Whether your journeys take you across the longest highway or busy motoring ways. The ZZ4187M3517N1 Howo a7 tractor head brings you a journey experience like no other. With all the features of a premium tractor, from its advance driveline technology to its commanding presence,ZZ4187M3517N1 Howo a7 tractor head is equiped with WD615 series engine,The engine power is from 336HP to 371Hp,Max. Driving Speed is 101 km/h, Gearbox is HW13710CL.