Same engine as before, Diesel 4cyl turbo awesomeness. Cept it sounds like a normal gas engine. I've watched a few tuts and even read a couple, But I'm not seeing what they are seeing. I'm using the Dieselmotors_hopper mod and the Cummins sound mod for the D series. I just can't figure out how to match them together. I would ask for help understanding but at this point, It may just be better that I ask someone to match them together for me. After 3 hours of trying. (Not a sound modder I guess..)