Yep, but for me, this was an easy swap. I needed my truck running, and even our local Cummins guru, a friend of mine, wouldn't take the job. I had a 12 valve in a F350 2 years ago, and the VE with 3.55 gears got me 20-22 MPG. Easy to tune, and ran great. We'll see how this one does. Only bad part, is losing the Edge controller. That push button power was great. I'm hoping to pick up 3-4 mpg with the VE, and I'm running the 24 valve injectors.