This kit is amazing, everything was a breeze to install, there are so many tuners that are already familiar with Texas speed so the tunes are always near perfect, and everything is super high quality, Texas speeds ls7 lifters and updated lifter trays are great too, no ticking at all even on first start up. This cam gave my 5.3L a ton more power, a mean sounding rumble, and BETTER fuel economy, I was getting 14-15mpg and now I’m averaging anywhere from 17-19, couldn’t be happier!