HPR SUPERIOR GTR 8HP CONVERSION KIT
This is the new 8HP GTR kit offered by HPR. Please note the new kit is around a 16-18 week build time and it is built to order only. In Australia the options have changed a little, the kit is now sold in a more simple form, which allows you to customise it to your build.
Introducing the Superior solution for installing an 8HP transmission into your Skyline GTR!
The crown jewel of the new Superior kit is undoubtedly the billet RB bellhousing, ingeniously merging the 8HP centerplate into a singular unit.
Developed in-house at HPR, utilizing cutting-edge metrology-grade 3D scanners and Geomagic Design X software, the Superior Kit sets a new standard in transmission upgrades. Meticulously curated components ensure a premium feel and an unmatched driving experience for Skyline GTR enthusiasts.
Advantages of the Superior Kit are abundant:
- No chassis modifications required across all Skyline GTR models.
- Eliminates the need for cutting the bellhousing to accommodate starter or front propshaft.
- Matches the built length of the 6-speed Getrag found in the R34 GTR.
- No custom front propshaft necessary (spacer kit supplied for R32/33 users; R34 direct fit).
- Includes a billet steel flexplate for added durability.
- 100% bolt in with stock propshafts for R34GTR
The Superior Kit comes complete with a prepped transmission and all necessary parts for mechanical installation.
With machining and external components like the bellhousing pre-installed, installation is straightforward. Simply bolt on your transfer case and install the transmission as a single unit.
Note
The Superior Kit necessitates CNC machining and modification of the 8HP converter, housing, and rear planetary gear, all carried out by our skilled technicians at HPR. Consequently, it will only be available as a complete kit inclusive of the transmission.
Propshafts, oil cooler, and controls are not part of this kit.
The included transmissions are sourced from BMW vehicles originally equipped with the N57 engine. Rest assured, each transmission undergoes thorough inspection to ensure quality and is backed by a comprehensive 90-day warranty.
This kit contains
- Used 8HP70 core transmission fully inspected with modified rear planetary gear installed.
- RB to 8HP billet housing (installed to transmission)
- Billet flex plate, with ring gear
- 8HP Breather mod kit
(needed for minimal tunnel clearancing in Nissan transmission tunnels)
- 3 piece billet crossmember kit
- 8HP To Transfer Case Adapter Kit
- Billet 7075 oil pump cover kit for GTR transfer
- Shift selector blockout
- Shifter cover plate for transfer case
- Nissan Billet shifter mount kit
- 8HP HPR billet oil pan with integrated thermostat kit.
- Seal kit for transmission (already installed)
- Re-usable bolt kit w seals for front cover.
- Printed installation instructions.
Note
The Superior Kit does not include a trans controller, wiring, gear display, shifter. Which was included in the previous kit.
You can opt to have the transmission prepped internally for a Turbo Lamik. HPR will install the PCB and have the transmission ready to connect to a Turbo Lamik. Alternatively it can be left with the factory N57 TCU in place, which is used if you are planning to set the kit up with a CanTCU or Maxxecu for trans control.
Used 8HP transmission specs
As standard, we include the upgraded A and D backing plates from Sonnax, all new seals, and breather mod kit installed.
Prepwork included
- Remove all internal components
- Remove mechatronics module
- Disassembly and inspection of all internal components
- Inspect/measure all clutch packs/replace with new if needed
- Supply and install Sonnax HD backing plates for A and D clutch
- Remove/install rear planetary gear (modified for GTR kits)
- Supply and install rear seal kit/HPR output change (if purchased separately in kit)
- Supply and install HPR breather mod-kit
- Supply and install HPR front seal kit
- Reinstall all internal components acc to specification
- Install Oil pan, mechatronics module, wiring plug
- Acid clean of transmission
Note
- R34 GTR transfercase will not work with this kit
- R32/33 GTR Front propshaft needs to be extended with spacer kit
included in kit price.
- Rear propshaft needs to be shortened for R32 and R33 chassis
Upgrade options for the HPR Prepped Transmissions
HPR Cat 0 build 1000Hp 1000Nm (from $21900)
This is a clutch stack rebuild, (stock capacity) done in house at HPR
Only done on low mileage transmissions in good condition.
Installation of Suncoast Cat 0 kit:
Full disassembly, ultrasonic clean, all rotating assembly thoroughly inspected.
Dry stack clutch build to set clearance, final wet build.
HPR Cat 1 build 1000Hp 1000Nm (from $25900)
This is a full transmission rebuild, done in house at HPR
Installation of Suncoast Cat 1 kit with following options:
Zip kit and Bushing kit from Sonnax, New genuine ZF solenoids.
Full disassembly, ultrasonic clean, all rotating assembly thoroughly inspected.
Replace pistons w seals. Install Sonnax bushing kit.
Full valve body teardown, ultrasonic clean, installation of Sonnax Zip kit and new molded valve body separator plate. Ream/replace with oversize valves if needed. Replace all solenoids.
Full post test of valve body. Dry stack clutch build to set clearance, final wet build.
HPR Cat 2 build 1300Hp 1300Nm (from $26900)
This is a full transmission rebuild, done in house at HPR
It comes expanded capacity clutch packs, and all the contents from the Cat 1 build plus
Sonnax HD E-hub and Suncoast Oil pump.
Installation of Suncoast Cat 2 kit with following options:
Zip kit and Bushing kit from Sonnax, New genuine ZF solenoids, Suncoast Oil pump, Sonnax HD E-hub
Full disassembly, ultrasonic clean, all rotating assembly thoroughly inspected.
Replace pistons w seals. Install Sonnax bushing kit.
Full valve body teardown, ultrasonic clean, installation of Sonnax Zip kit and new molded valve body separator plate. Ream/replace with oversize valves if needed. Replace all solenoids with new. Full post test of valve body. Dry stack clutch build to set clearance, final wet build.
HPR Cat 3 build 1600Hp 1600Nm (from $30500)
This is a full transmission rebuild, done in house at HPR
It comes expanded capacity clutch packs, and all the contents from the Cat 1 and Cat 2 build, plus the Suncoast billet E-hub.
Installation of Suncoast Cat 3 kit with following options:
Zip kit and Bushing kit from Sonnax, Suncoast Oil pump, Sonnax HD E-hub
Full disassembly, ultrasonic clean, all rotating assembly thoroughly inspected.
Replace pistons w seals. Install Sonnax bushing kit.
Full valve body teardown, ultrasonic clean, installation of Sonnax Zip kit and new molded valve body separator plate. Ream/replace with oversize valves if needed. Bench test all solenoids.
Full post test of valve body. Dry stack clutch build to set clearance, final wet build.
