The Chevrolet Blazer 4.3 V6 190hp (1998 - 2005) produces 190bhp and 353Nm in standard form. Our Stage 1 ECU tuning file raises output to 215bhp and 385Nm, a gain of 25bhp and 32Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.