Nismo originally Planned to sell 99 400Rs, but in fact just 44 400Rs were sold.

The details of the 400R are:

1. REINIK 2.8 litre engine (called RB-X GT2 : 400R exclusive)
2. Hood top mall ??????
3. Emblem (400R exclusive)
4. Front bumper with air intake (400R exclusive)
5. Front bumper air intake for oil cooler
6. Intercooler air guide
7. Carbon rear wing
8. Over-fender (400R exclusive)
9. Big side skirt
10. Rear bumper and 400R emblem (400R exclusive)
11. LM bonnet (carbon, 400R exclusive)
12. Aluminium wheels (18inch LM-GT1)

13. HID head light (400R exclusive)
14. Combination meter with 400R logo (400R exclusive)
15. Titanium shift knob
16. Front seats with nismo logo
17. Titanium dual tube exhaust (400R exclusive)
18. Double plate clutch
29. Carbon propeller shaft (400R exclusive)
30. Bilstein shock absorber (400R exclusive)
front:7kgf/mm rear:8kgf/mm
31. Titanium strut tower bar
32. Nismo type 2 brake pads
33. Brake master cylinder stopper
34. Exclusive trim

Detail about RB-X GT2 engine
400ps/6,800rpm
47.8kgm/4,400rpm
ecu (400R exclusive)
Reinforced cylinder block (400R exclusive)
Cylinder head (400R exclusive)
87 metal head gasket t=1.2
piston with cooling channel (400R exclusive)
forged crank shaft (400R exclusive)
forged connecting rod (400R exclusive)
N1 turbine with reinforcement actuator
high flow air cleaner
stainless down pipe
low air resistance sport catalizer
N1 radiator
N1 radiator cap (1.3)
Oil cooler, Nismo Sports Intercooler.