I agree with above ^

Just get an exhaust shop to do the whole exhaust in one go.

Intake is easy.

TB/IM shouldn't be hard as long as you make sure you reconnect any wires/sensors/hoses etc, just that the rear IM bolts are a PITA to get to.

Lights not so bad, also just a PITA getting to mounting bolts on the front. Removing bumper makes it easier.