Type RA Gear Set for 5MT '99-'07 Base Kit
(Ratios -- 3.083 / 2.062 / 1.545 / 1.151 /
RA-IK02 RA Install Kit MY02 WRX (TY754VN2AA) $197
RA-IK03 RA Install Kit MY03 WRX (TY754VN2BA) $156
RA-IK04 RA Install Kit MY04 WRX (TY754VV4AA) $52
RA-IK05 RA Install Kit MY05-07 WRX $79
RA-IK08 RA Install Kit MY08+ WRX $300
RA-IKNT1 RA Install Kit MY99-04 Non-Turbo $266
RA-IKNT2 RA Install Kit MY05 Non-Turbo $120
RA-IKNT3 RA Install Kit MY06-07 Non-Turbo $147
Type STi Gear Set for 5MT '99-'07 Base Kit
(Ratios -- 3.166 / 1.882 / 1.296 / 0.972 /
ST-IK02 STI Install Kit MY02 WRX (TY754VN2AA)
ST-IK03 STI install Kit MY03 WRX (TY754VN2BA) $372
ST-IK04 STI Install Kit MY04 WRX (TY754VV4AA) $268
ST-IK05 STI Install Kit MY05+ WRX $52
ST-IKNT1 STI Install Kit MY99-04 Non-Turbo $482
ST-IKNT2 STI Install Kit MY05 Non-Turbo $336
ST-IKNT3 STI Install Kit MY06+ Non-Turbo $120
parts are now sold separately from the gear set. Please select the
required install kit when ordering either type RA or type STI gear
sets. Base kit includes main shaft, 1st to 5th gears, and speedometer
gear. '99-'01 turbo models (non-USA models) should order MY02 WRX
Version 4 RA gearset is available to fit '95-'98 models. Please
contact us for pricing and availability.
is the least expensive way to substantially increase the reliability
of the WRX gearbox. Only Rallispec RA & STi gearsets feature
the REM isotropic superfinishing process (micro-polish) now treated
entirely in-house. ISF provides substantial benefits in terms of
reducing gear tooth friction and eliminating surface imperfections
(stress risers). REM ISF is used extensively at the highest levels
of motorsport (F1, WRC, Nascar). Our real world testing has shown
huge improvements in reliability far beyond any other surface treatment
we have tested.
Type RA sets are close ratio sets for maximum acceleration and performance.
Type STi sets are similar to stock (slightly closer ratio in 1st,
2nd, and 3rd) for better highway performance and top speed capabilities.
RA has a slight edge in torque capacity over the STi sets.
kits come with the parts necessary to properly install the gear
set into your particular vehicle. At minimum the kit will include
a full set of shaft lock nuts, case gasket, and oil seal. Some kits
will include additional parts such as updated synchro hubs, thrust
washer, shift rail, etc.