The stage III lift include poly forthe following items:
Upper A arms
Upper Rear Shackle mounts
Poly in the upgrade spring packs
Front and rear shocks
Upper and lower A arm bumpstops
Rear poly bumpstops
Endlink bushings
Not sure what a tension arm is...
I'm pretty sure the only thing you can install without purchasing the lift components is the bumpstops (except maybe the rear shackle bushings since the original design required the OEM ones) and the endlink bushings...
- You'll need their upper control arms to run the arm bushings.
- The Bilsteins now come with upper poly bushings and bumpstops.
- The spring packs come with the poly bushings