Cummins PhatShaft Add-A-Turbo Kit (1994-2002)Cummins PhatShaft Add A Turbo Kit (1994 2002) The Industrial Injection 2nd Gen 5. 9L Cummins Compound Phatshaft Add A Turbo Kit is a great upgrade for someone looking for increased performance. This kit is designed to be used on a Cummins that is already running one of our Phatshaft turbos and is then compounded with a BorgWarner S475 turbo to maximize the engines efficiency when larger injectors are added. This kit works on all 1994 2002 12 valve and