He told me that they would be direct bolt ons. At that time I didn't mind paying a little extra cash to have them fit good, the problem is that they started smoking right away.The front comppressor of the intake side of the turbo, they made a adaptor plate that wasnt leveled at all and we had to fix the plate. There was no connection for the compressor side of the turbo so we had to make pipes to fit them in. The back side of the turbo the bolts were also loose. So we had to tighten them.