NSX-R 4.23:1 Final Drive Gearset

Description

In Japan, a special performance tuned version of the NSX is available. The NSX-R model includes a higher ratio final drive gearset that increases the normal NSX 4.062:1 ratio to 4.235:1. This modification results in noticeably faster acceleration times. Performance chart available from NSXPrime. Includes all 4.23 final drive ratio required parts (pinion shaft, ring gear, oil gear) as well as NSX-R differential conversion kit (NSX-R stopper plate and spring plate). 

Application notes (please contact us with questions):

  • 1991-1994 5-spd: direct drop in
  • 1995-1996 5-spd: requires differential from 1991-94
  • 1997-2005 6-spd: requires differential swap, not compatible with power steering
  • 1991-1996 with 6-spd conversion: requires swapping existing 5-spd differential with 6-spd differential
 
NSX-R differential conversion kit:
For customers wanting to upgrade their non-NSX-R differential, the NSX-R stopper plate and spring plate is available separately. These two components allows the differential to transfer more torque to the inside wheel during cornering, improving performance. The stopper plate and spring plate are included with the NSX-R final drive kit (part no. dpp-161 and dpp-162).
 
Speed
0-MPH
BaselineJapanese
5-speed
4.235 R&P4.55 R&PJapanese 
5-speed
4.55 R&P
Japanese
5-speed
4.235 R&P
0-30 2.16 2.16 2.08 1.94 1.94 2.08
0-40 2.92 2.92 2.80 2.62 2.62 2.80
0-50 4.16 4.11 4.11 4.02 3.91 4.04
0-60 5.56 5.34 5.45 5.27 5.00 5.22
0-70 6.99 6.60 6.82 6.54 6.60 6.42
0-80 8.46 8.52 8.23 8.45 8.24 8.44
0-90 10.74 10.46 10.65 10.42 9.94 10.28
0-100 13.13 12.48 12.91 12.49 12.33 12.58
0-110 15.66 15.67 15.31 15.40 15.39 15.64
0-120 19.02 19.25 19.02 18.72 18.38 18.98
0-130 23.56 23.27 23.24 23.42 23.26 22.72
0-140 28.93 27.91 28.13 28.90 30.36 30.04

calculated estimates of perfomance gains with available gear options

Honda 5-spd NSX-R 4.23 final drive kit - NSX, 1991-94

dpp-161

$1,720.75
Honda 6-spd NSX-R 4.23 final drive kit - NSX, 1991-05

dpp-164

$1,743.75
Honda NSX-R Differential Conversion Kit - NSX, 1991-96, 1997-05 w/ mod

dpp-169

$125.00