I installed this is my 2007 dodge nitro with the 3.7L and it woke this a sleeping baby. I would have to say that this is the biggest gain for your buck. It also fixes to sloppy 1st-2nd shift. And for everyone out there that wants to mix it up with some bigger tires this will help you make the adjustments to do so. Install was quick and easy. I updated the tuner to my application and plugged it into the truck. After I Went through a series of questions I was good to go.