Bullydog for Jeep JK
The Tuner is well made and instructions are very good. Only downsides are the it only has 4 maps for my Jeep JK, the head unit is small, and then menus are confusing. Overall it does what it says it does and I went from 14 MPG to 17.5 MPG. A pretty good bump for a Jeep. The tire size tool fixed my laggy speedo(-5MPH) back to the correct speed. Overall worth the money, but it needs a little more work like more maps and a little bigger screen.