I have the chance to buy a PDR HX 40. Freshly rebuilt. It has a 18 cm housing on it now. I would like the 16 cm housing. Is anyone running a 18 with simular mods. If I do buy the turbo, someone want to trade an 18 for a 16? My truck is more of a daily driver than a tow truck or race truck, but I do both! If I have to buy a new 16 cm housing it will almost be just as cheap to buy a whole new turbo.