featured:
IMPORTANT SERVICE BULLETIN: ScienceofSpeed recommends replacing
crankshaft pulley on early NSXes.
Click for more details.
new products -
NSX
new -
gauge mounting plate
new -
factory oil
pressure sensor upgrade
new -
LCD Display & Mount
updated -
navigation pod
updated -
lost motion assys
new -
ScienceofSpeed
Twin Turbo System
new -
Clutch
Alignment Tool
new -
coolant expansion tank
new -
Power Enterprises
Timing Belt
new -
front side
marker lamps
new -
ScienceofSpeed
Sport Clutch
new -
OS Giken 4.62:1
SuperLock LSD
new -
reinforced silicone
coolant hose kit
new colors -
NSX floor
mats
new -
Koyo
Aluminum Radiator
new -
targa shock
tower brace
new -
oil feed &
pressure adaptor
Japanese
and European 5-speed NSX are equipped with a gearset that offers tighter
2-4 gear ratios. The US gearset results in shift
points in the lower gears that places the resulting engine speed below
the optimal power point. The JDM short gears allow better acceleration
especially noticeable in the shift between 1st and 2nd as the engine
does not fall out of the useable powerband. The JDM Short Gearset includes all parts to
retrofit your US-spec gearbox. This modification results in faster
acceleration times. Excellent in combination with the NSX-R 4.23 or
Comptech 4.55 final drive gears.
The kits include the mainshaft and gears for the counter and mainshaft.
For high mileage NSX, we recommend replacing the common gears found in
all NSX transmissions.
calculated estimates of
perfomance gains with available gear options
(courtesy of
NSXPrime.com)
We offer as an option the "common gears"
found in the US and Japanese 5-spd transmissions. These three gears
include the countershaft 1st gear, mainshaft 5th gear, and countershaft
5th gear. These gears do not need to be replaced in transmission
rebuilds unless there is existing damage or there is wear from mileage
(we usually recommend replacing these if the transmission has more than
150k miles.
Japanese
and European 5-speed NSX are equipped with a gearset that offers tighter
2-4 gear ratios. The US gearset results in shift
points in the lower gears that places the resulting engine speed below
the optimal power point. The JDM short gears allow better acceleration
especially noticeable in the shift between 1st and 2nd as the engine
does not fall out of the useable powerband. The JDM Short Gearset includes all parts to
retrofit your US-spec gearbox. This modification results in faster
acceleration times. Excellent in combination with the NSX-R 4.23 or
Comptech 4.55 final drive gears.
NSX 1991-96