Hey everyone it's been awhile since I've posted on here. Things have changed quite a bit in the last few years no longer racing Duramax or truck pulling but I bought a 4500 top kick 2008 short bus that I'm converting into a sled hauler and these things are notoriously terrible on fuel I just wondering if anybody has done a twin turbo kit for a top kick. This bus will be making tours across Canada so I'm trying to get the fuel economy a little better thanks in advance
