I had the dealer install a Jacobs exhaust brake right out of the Dodge accessory catalog before I took delivery of my 01. I love it! Haven't had a problem with it since I bought it in May 01 and it holds my truck and camper combo going downhill. Couldn't be happier. I'm not sure about the 07's but I'd ask the dealer. Jacobs makes them to plug and play on the Dodges. The only thing you might want to consider is if you will change out your turbo to an aftermarket one in the future. Again, I'm not sure about the 07's but my turbo and Jake are only compatible with each other due to the fact that they bolt together. Other turbos including a friend's 98 CTD and aftermarket ones attach with a band clamp which is a bit more of a universal fit and will be how any turbo you might put on in the future will attach to the exhaust system and exhaust brake. If this is the case, double check the current ones Dodge offers to see how it attaches. If you need to go with the band clamp you may need to look at an aftermarket one. You will find as many people here telling you they love their particular brand of brake as you will find guys in public telling you they love their Dodge, Ford, or Chevy. I do have some experience with PacBrakes on the work trucks I drive and none of it has been positive. Love that Jacobs!!
Welcome aboard the TDR!