The GP3/13 makes use of a less than 3.5 litre engine .
Chassis The car has also been designed and built by Dallara . ; Engine : The GP3/13 uses a naturally aspirated 3.4-litre V6 400 hp engine , developed by AER Ltd. ; Gearbox : The GP3/13 will again use a 6 speed longitudinal sequential gearbox developed by Hewland .
GP3 Series