This is for anyone not happy with their power from the newer mack engines. I have a 05 chn with the 427 13 speed roadranger 4.11 rears and tall rubber and it was sick. We installed 20% over injectors from Rochester fuel injection and made it run much better. Brad was very easy to deal with and recommend him to everyone. The pyro is not reading to hot and have gained around 5 mph on the hills fuel economy will suffer a little if i really stay after it. I just wanted to put this out there for everyone because there is such a shortage of info on this sort of thing hope this helps anyone who is interested.
