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Garrett Powermax GT4094VA Stage 2 turbocharger for 04.5-10 Duramax engine codes LLY/LBZ/LMM. This turbo features a larger compressor trim, larger GT40 turbine wheel and vanes over the stage 1 model. It utilizes nine moveable vanes which increase turbine effciency and improves the vehicles engine performance. The turbo can support up to 575HP.
This is a drop-in upgrade and does not require any modifications but we do suggest adding fueling upgrades and a tune to fully utilize this turbocharger.