The Chevrolet HHR 2.4i 170hp (2005 - 2011) produces 170bhp and 222Nm in standard form. Our Stage 1 ECU tuning file raises output to 180bhp and 237Nm, a gain of 10bhp and 15Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.