I put the BullyDog chip in about 5 years ago, I forget the model..."rapid power" or something like that. It's just plug and play with the fuel rail pressure sensor. They claim 35hp. It felt like quite a boost when I put it in (but you always have to discount the "placebo effect"). Now that I'm used to it, it's just my everyday awesome ride.

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Mark in MA
05 MB E320CDI 402k Granite Grey Metallic
05 MB E320CDI 267k Black
05 MB E320CDI 232k White
05 MB E320CDI 209k Tectite Grey
99 Dodge 2500 Cummins 5sp 148k
62 Jeep CJ-6 120k