Faster spool and sharper response are key advantages of a ball-bearing turbocharger on the SR20DET. The Tomei ARMS BX8270 Ball Bearing Turbocharger Kit (part number TB403A-NS08B) is a complete bolt-on solution developed for the Nissan 180SX and Silvia S13, S14, and S15, combining a high-flow billet compressor wheel with a dual ball-bearing center section capable of supporting approximately 450 horsepower with proper supporting modifications.
The kit features a CNC-machined billet compressor wheel that improves airflow and efficiency over traditional cast designs, paired with a ball-bearing cartridge that reduces friction and allows the turbo to reach boost more quickly than a comparable journal-bearing unit. A multi-rate billet actuator is included along with six springs, giving tuners the ability to fine-tune boost pressure for different setups and driving styles. Engineered as a direct-fit upgrade for the SR20DET, the BX8270 includes the necessary gaskets, oil lines, hardware, and related components for installation.
This turbocharger is well suited to S-chassis builds that prioritize responsive power delivery along with solid peak output. At Terra Firma Automotive, we supply this genuine Tomei ARMS BX8270 Ball Bearing Turbo Kit as a high-performance Japanese upgrade for SR20DET-powered 180SX and Silvia models. Whether the goal is a sharp street car or a higher-output track setup, the BX8270 delivers the spool characteristics and airflow expected from Tomei’s ball-bearing ARMS series. Choose Terra Firma Automotive for authentic Tomei turbocharger systems that elevate the performance of the SR20DET.
- Genuine Tomei ARMS BX8270 Turbocharger Kit
- Part Number: TB403A-NS08B
- Application: Nissan SR20DET
- Ball bearing (B/B) center section
- CNC billet compressor wheel
- Compressor inducer approx. 59.0 mm / exducer approx. 76.2 mm
- Multi-rate billet actuator
- Includes 6 springs for boost adjustment
- Supports approximately 450 HP with supporting mods
- Faster spool compared with journal-bearing equivalents
- Bolt-on style upgrade for SR20DET
- Includes gaskets, oil lines, and necessary hardware
- Improved response and airflow versus stock turbo
- Trusted Tomei ARMS series engineering
- Available from Terra Firma Automotive
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