R4+ 6 speed sequential gearbox for Subaru

Due to the high level of inquiries received about our earlier version of the Subaru sequential gearbox ( Subaru R4) we are releasing this version again with the latest advanced technologies used in our products.

Engineered to fit the original Subaru case without modifications. Weight reduction of 10,5 kgs compared to the standard Subaru transmission! 
The gearbox has integrated an ultra lightweight aircraft grade aluminium CNC plate section that holds the new sequential mechanism and shafts.

Complete also with upgraded high strength gears and shafts, billet selector forks and billet selector rods made of the highest quality steel.

All parts are REM isotropic superfinished.

Using the standard Subaru gearbox housing, the sequential kit is designed for the racer looking to have a quick shift sequential gearbox and keeping budget in mind. Kit is supplied in assembly position for easy installation into the gearbox. No modification required!

Fast facts
  • Gearbox type: 6 speed full sequential gearbox
  • Gear shift layout: R-N-1-2-3-4-5-6-R-N-1-2...
  • R4 Kit Weight: 29kgs
  • Total gearbox weight: 76kgs (10.5kilos lighter than a standard 6 speed STI gearbox)
  • Maximum torque: 1000NM
  • Tooth profile: Straight cut
  • Shift performance: 40 - 50 milliseconds

Complete, ready to install gearboxes

We at X Shift offer installation of sequential gear kits into your original gearboxes. The service includes cleaning and inspection of all parts, differential adjustment, setting teeth clearance of final drive and installation of the sequential kit.

 

 

 

Last but not least we offer renovation of old gearboxes and possible replacement of OEM parts.

KIT INCLUDES

  • BILLET aircraft grade CNC aluminium case
  • COMPLETE SEQUENTIAL mechanism with dog engagement
  • INPUT Shaft and OUTPUT Shaft
  • GEARS 1st - 6th
  • SHIFTING Forks
  • SHIFTING Rods
  • BEARING and NEEDLE Bearing Set
  • GEAR POSITION Indicator Sensor
  • INLET /OUTLET for oil cooler

RATIOS AVAILABLE

1.  3.33 / 2.92

2.  2.38 / 2.14 / 2.06

3.  1.80 / 1.59 / 1.56 / 1.47

4.  1.41 / 1.37 / 1.26 / 1.09 / 1.09

5.  1.14 / 1.06 / 1.05 / 1.00 / 0.83

6.  0.95 / 0.90 / 0.84 / 0.64

Subaru R4+ C1 = 215,5 km/h at 6500 rpm
Subaru R4+ C2 = 243 km/h at 6500 rpm
Subaru R4+ MR2 = 187 km/h at 6500 rpm