Produkty
H-pattern dogboxes

R4 PRO DOGBOX – 6 speed SHD kit Subaru STi

Suitable for:
Subaru

The brand new 6 speed DOGBOX kit for Subaru STi follows all the success of our previous H-pattern kit that was proven by years on the market.

Revolutions
6500 RPM
Revolutions
Torque
1000 Nm
Torque
Gears
6
Gears
R4 PRO DOGBOX – 6 speed SHD kit Subaru STi
Specification

This DOGBOX for original Subaru STi gearboxes is a complete kit with straight teeth and unique dogbox engagement system. Compared to the older H-pattern version, the gearbox offers a dramatic increase in stiffness of the entire shifting system, significantly improving shifting reliability and accuracy. Upgraded version utilizes a revised shifting mechanism based on the +PLUS version, with stronger dog rings with modified dog geometry that ensures a perfect gear-to-shaft connection.

The kit is designed to fit into the OEM case without major modifications. Rebuild at X Shift Gearboxes is possible and includes overall inspection of the gearbox, renovation of casings, adjusting final drive backlash, complete installation and assembly.
Why XSHIFT?
Major Advantages
  • Available with several gear ratio options
  • Strong H pattern – cost saving solution for racing cars
  • Smooth and fast shifting
  • Rated up to 1000 Nm
  • Easy replacement of original kit
  • Parts made of billet steel, specially heat treated and finished by REM method
Shifting and gear ratios

There are 7 main gear ratios available, that can be also combined with each other to achieve the most suitable ratio for your application. For final drive you can choose from two options.

 Gear ratio 1 2 3 4 5 6
C1 3,33 2,38 1,80 1,41 1,15 0,94
C2 3,33 2,38 1,80 1,37 1,05 0,83
C3 3,33 2,14 1,59 1,26 1,05 0,90
C4 2,91 2,08 1,56 1,21 1,00 0,83
MR1 3,64 2,87 2,27 1,80 1,43 1,16
MR2 3,33 2,38 1,87 1,53 1,28 1,09
MR-N5 3,10 2,42 2,00 1,67 1,39 1,17
Final drive 10/39 (3,9) 10/44 (4,4)        
Kit includes
  • Billet shifting mechanism with dog engagement
  • Input and output shaft
  • Gears 1st – 6th
  • Shiting forks
  • Shifting selector rods
  • Bearing and needle bearing set
  • Inlet/Outlet for oil cooler
Accessories

Together with the powerful Subaru SHD R4 PRO dogbox kit we can provide many performance accessories that helps you achieve top results on the track.

and many more...
Photogallery

Gear ratios calculator

Gear T1 T2 ratio RPM down speed speed down
1 12 40 3.33 - 59.8 -
2 13 31 2.38 1850 83.6 23.8
3 15 27 1.8 1591 110.7 27.1
4 17 24 1.41 1404 141.2 30.5
5 20 23 1.15 1204 173.3 32.1
6 18 17 0.94 1161 211 37.7
Tyre metric dimensions
Tyre inch dimensions

If you have choosen your configuration, please take a screenshot of this calculator and attach it to the configurator below.

Kit configurator

For prices and more info, please contact us down below.

Please fill in your details and as many information as possible about your car (power, race purpose). After sending your configuration we will contact you as soon as possible.

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X Shift Gearboxes sample catalog mockup
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