| Category | Le Mans Prototype (LMP2) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | HPD (Wirth) | ||||||||
| Designer(s) | Nick Wirth | ||||||||
| Predecessor | HPD ARX-03b | ||||||||
| Successor | Acura ARX-05 | ||||||||
| Technical specifications[1][2] | |||||||||
| Chassis | Carbon fibre composite monocoque | ||||||||
| Suspension (front) | Double wishbones, push-rod actuated coil springs and four-way adjustable dampers, anti-roll bar | ||||||||
| Suspension (rear) | Double wishbones, push-rod actuated coil springs and four-way adjustable dampers, anti-roll bar | ||||||||
| Engine | Honda HR28TT 2.8 litre V6 twin turbo mid-engined, longitudinally mounted | ||||||||
| Transmission | 6-speed sequential manual | ||||||||
| Weight | 900kg | ||||||||
| Fuel | Shell | ||||||||
| Tyres | Continental | ||||||||
| Competition history | |||||||||
| Notable entrants |  Extreme Speed Motorsports | ||||||||
| Notable drivers | Ed Brown Jon Fogarty Johannes van Overbeek Scott Sharp Ryan Dalziel David Heinemeier Hansson | ||||||||
| Debut | 2015 24 Hours of Daytona | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
The HPD ARX-04b is an LMP2 race car designed and built by Wirth Research for Honda Performance Development. The car was designed as the successor to the HPD ARX-03 series of Le Mans Prototypes, however the poor performance of the car meant that the older model outlived the ARX-04b, and the 04b only contested one race, the 2015 24 Hours of Daytona.
- ^ "HPD ARX-04 Specifications". "Ultimate Car Page". Retrieved 2016-08-20.
- ^ "HPD ARX-04 Specifications". "Racecar Engineering". Retrieved 2016-09-06.