Upgrading the factory twin turbos is one of the most effective ways to unlock significant power from the RB26DETT. The Tomei ARMS MX7655 Journal Bearing Turbocharger Kit (part number TB401A-NS05A) is a complete bolt-on solution designed specifically for the Nissan Skyline GT-R platform, delivering strong mid-range response and the capability to support approximately 580 horsepower with proper supporting modifications.
At the heart of the kit is a CNC-machined billet compressor wheel that improves airflow and spool characteristics compared with traditional cast designs. The turbocharger uses a durable journal bearing center section and is paired with a multi-rate billet actuator that includes six springs, allowing fine adjustment of boost pressure to suit different setups. The kit is engineered as a direct-fit upgrade for the RB26DETT and includes the necessary gaskets, oil lines, hardware, and related components for installation.
The MX7655 sits in a balanced performance range—capable enough for serious power gains while retaining usable response for street and track driving. It is well suited to R32, R33, and R34 GT-R owners looking for a proven Japanese turbo upgrade that improves both peak output and overall drivability. At Terra Firma Automotive, we supply this genuine Tomei ARMS MX7655 Journal Bearing Turbo Kit as a high-quality solution for RB26 builds seeking reliable, bolt-on forced induction performance. Choose Terra Firma Automotive for authentic Tomei turbocharger systems engineered to elevate the legendary RB26DETT.
- Genuine Tomei ARMS MX7655 Turbocharger Kit
- Part Number: TB401A-NS05A
- Application: Nissan RB26DETT
- Fitment: Skyline GT-R R32 / R33 / R34
- Journal bearing (J/B) center section
- CNC billet compressor wheel
- Multi-rate billet actuator
- Includes 6 springs for boost adjustment
- Supports approximately 580 HP with supporting mods
- Bolt-on style upgrade for RB26DETT
- Improved airflow and spool versus stock turbos
- Strong mid-range response with higher peak potential
- Includes gaskets, oil lines, and necessary hardware
- Durable Japanese performance turbo design
- Trusted Tomei ARMS series engineering
- Available from Terra Firma Automotive
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