The Chevrolet HHR 2.2i 143hp (2005 - 2011) produces 143bhp and 203Nm in standard form. Our Stage 1 ECU tuning file raises output to 150bhp and 225Nm, a gain of 7bhp and 22Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.