Reviewed By Timothy S (San Jose, CA) Reviewed for a 2011 Chevy Tahoe —6/13/2012 2:16 AM
Used Cortex Programmer with, K&N intake, and Magniflo muffler. Around town MPG improved 1-1.5 and Highway about the same. More power, shifts are smooth and engine sound is awesome. Programmer was easy to install and I am not a car buff. Once you program the computer you un plug it and are good to go.