Specs:

• Compressor: T04E 50
• Turbine: Stage 3 (57mm)
• Turbine A/R: .63

From Turbonetics:
"The T3/T4 Hybrid turbochargers consist of a T3 turbine section, (Stage I, Stage II, Stage III or the Stage V Trim) and a T4 compressor section (T04B trim, T04E trim & 60-Series). This combination offers the low inertia and fast boost response of the lightweight T3 turbine wheel and the highairflow characteristics of the T4 compressor family. All T3/T4 Hybrid Turbochargers are available with the patented Ceramic Ball-Bearing option highlighted on page 9. The Ceramic Ball-Bearing T3/T4 Hybrid series offers the fastest spoolup available. Coupled with extreme durability, the Ceramic Ball-Bearing concept provides the best available performance available in the turbocharging aftermarket. All T3/T4 Hybrids are custom matched for specific applications. Ranging from 200 HP to 600 HP. Contact a Turbonetics Turbo Specialist for application assistance and availability."

Also available in ball bearing, add $250.