Garrett G42-1585 G-Series II super core (P/N 938339-5003S) — the dual ball bearing center cartridge assembly with compressor cover and backplate, ready to pair with a Garrett turbine housing of your choice. The 79mm Gen 2 compressor aero flows up to 10% more than G-Series Gen I at peak pressure ratio, supporting 475 to 1585 HP across 2.0L to 7.0L engines. A one-piece center housing and backplate cut failure points, and a shorter bearing cartridge runs twin piston rings on both sides of the shaft to reduce oil seal leakage. G-Series II reuses Gen I compressor and turbine housing contours, so existing Gen I builders can carry over their compressor cover.
| Type | G-Series II G42-1585 super core (CHRA cartridge + compressor cover & backplate) |
| Bearing | Dual ceramic ball bearing |
| Compressor Wheel | 79mm inducer / 98mm exducer, 65 trim |
| Turbine Wheel | 82mm inducer / 75mm exducer, 84 trim |
| Horsepower | 475-1585 HP |
| Engine Displacement | 2.0L-7.0L |
| Note | Turbine housing sold separately; uses Gen I housing contours |
