2005 - 2011
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Order This File Ask a QuestionThe Jeep Grand Cherokee 6.1 Hemi V8 420hp (2005 - 2011) produces 420bhp and 569Nm in standard form. Our Stage 1 ECU tuning file raises output to 440bhp and 590Nm, a gain of 20bhp and 21Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.