at the greddy site the TDO6SH-20G says that it bolts onto the factory manifold. i have found these turbo for around 850. i was just wondering it was true that all of these types of turbos can bolt up to the factory manifold, or just the ones that come from the greddy site. becuase if this is true i will have to change my mind about buying a ct20b or a ATS ct27 which are at similar prices. Could someone please enlighten me on the TDO6SH-20G and if i would need anything more than just the turbo. thaks for your help.