This is an Arms M8270 Turbine Kit for the SR20DET from The Engine Specialist, Tomei. These new Arms Turbines greatly exceeds all performance aspects over the stock unit and delivers the most power and torque gains possible on a direct bolt on replacement turbo.

Here is what Tomei has to say about their SR20 bolt-on turbines:
M8270
- This model is designed for high power delivery at high RPMs. Full boost hits on the bench test at 4,500RPM and will maintain it all the way through the RPM range without dropping off. This will best suit the dedicated track cars that need power at the high RPM range.