The heart of the system is this cast bracket that holds the turbo and shifts the alternator up a bit for clearance. The turbo has a 46mm inlet diameter and a 58mm wheel diameter, and the bracket bolts to existing holes in the block using bolts included in the kit. The turbo comes out of the box already mounted to the bracket with the Big Head wastegate (A) and blow-off valve (B) already assembled. With these items integrated into the turbo housing, the final installation is very clean and factory-looking. The kit includes a new serpentine belt as well.