A Steeda technician once told me that, as a rule of thumb, turbo kit installation are more involving then supercharger kit. In other words, unless you or a friend are qualified in mechanic, the installation cost is going to be high.
On the On 3 Performance website, we can read:
Additional parts to complete the install:
- 39# Ford Motorsport Take-out test injectors $169
- On 3 Performance/PMAS Slot Meter kit, includes mounting flange $195
- Boost a pump (MSD) We currently do not sell but is needed
- 4” Cone Air Filter
You will probably also need a tuner like an SCT if you don't have one.
Plus, keep in mind that if you want everything to run perfectly, you'll have to invest in custom dyno tuning.
If you were already aware of all of that, well that's a great project!