For RB26DETT builds seeking higher peak power while remaining in a bolt-on turbo format, the Tomei ARMS MX8260 Journal Bearing Turbocharger Kit (part number TB401A-NS05B) offers a clear step up in capacity. Designed specifically for the Nissan Skyline GT-R platform, this kit is rated to support approximately 650 horsepower with appropriate supporting modifications and tuning.
The MX8260 features a CNC-machined billet compressor wheel that improves airflow and efficiency over traditional cast designs, paired with a durable journal bearing center section. A multi-rate billet actuator is included along with six springs, allowing precise adjustment of boost pressure to match the engine’s setup and intended use. Compared with the smaller MX7655, the 8260 is oriented more toward higher peak output while still delivering usable response across the powerband. 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.
This turbocharger suits R32, R33, and R34 GT-R owners who want a proven Japanese solution capable of supporting more serious power levels without moving to a fully custom turbo arrangement. At Terra Firma Automotive, we supply this genuine Tomei ARMS MX8260 Journal Bearing Turbo Kit as a high-performance upgrade for RB26 engines that demand greater airflow and output. Choose Terra Firma Automotive for authentic Tomei turbocharger systems built to elevate the legendary RB26DETT platform.
- Genuine Tomei ARMS MX8260 Turbocharger Kit
- Part Number: TB401A-NS05B
- Application: Nissan RB26DETT
- Fitment: Skyline GT-R R32 / R33 / R34
- Journal bearing (J/B) center section
- CNC billet compressor wheel
- Compressor inducer: 52.6 mm / exducer: 68.0 mm
- Multi-rate billet actuator
- Includes 6 springs for boost adjustment
- Supports approximately 650 HP with supporting mods
- Higher peak power potential than the MX7655
- Bolt-on style upgrade for RB26DETT
- Includes gaskets, oil lines, and necessary hardware
- Improved airflow and efficiency versus stock turbos
- Trusted Tomei ARMS series engineering
- Available from Terra Firma Automotive
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