Originally called Crawford F4, this F4 single-seater was selected by the FIA and SCCA Pro Racing to be the exclusive model in the F4 U.S. Championship since 2016. Its carbon fibre chassis combines speed and safety.

Equipped with a 2-litre Honda engine pushing out 160 bhp and Pirelli tyres, it is renamed the Ligier JS F4 from the 2018 season onwards and an evolution will be added improving driver safety even further.

Other engines can also be installed in the Ligier JS F4 depending on the championship.

Technical sheet


  • 2016 F4 Spec. carbon composite monocoque
  • Front and rear roll-over structure
  • Anti-intrusion side panels
  • Adjustable wings front and rear
  • Width: 1750 mm / 69''
  • Wheelbase: 2745 mm / 108''
  • Weight: 570 kg / 1254 lbs


  • Lightweight composite bodywork


  • Double wishbone, front and rear
  • Pushrod adjustable ride
  • Adjustable anti-roll bars


  • JRi 2-way adjustable dampers
  • Coil over dampers


  • Sadev 6-speed sequential
  • Tripod CV joints
  • Pneumatic paddle shift


  • Rack and pinion steering
  • Quick release steering wheel
  • Height adjustable column
  • Safety collapsible steering column


  • Honda - 2,0-litre - 160 bhp (for the F4 U.S. Championship)


  • FIA spec. 6-point harness
  • Front anti-intrusion panels
  • On-board fire suppression system
  • HANS compatible headrest
  • Nose box crash structure
  • Rear attenuator
  • 6 kJ wheel tethers


  • GEMS Performance Electronics
  • LDS3R display


  • 2 pot calipers
  • Tilton adjustable pedal box for position
  • Cockpit adjustable Brake Bias
  • Accessible fluid reservoirs