The previous owner did the install I checked everything over and jut replaced the gates racing belt on it. I looked over the whole kit so pretty much reassembled it myself. I am very good ith it knowing I have a big turbo srt4 and a 35r evo as well that I put everything on myself.I will uninstall and know its not the polished one. You dont need anything to convert it , its is the same motor in you g35 I have the turbo xs utech that you can use as well for an extra fee such as guages and etc.