Any recommendations for installers in the Seattle area? One shop quoted me $1600 (including balance and alignment).
Seattle installers - We've got some for you!
Cantrell Motorsport
Tru-Line Seattle
Achtuning
You can also take the car to any aftermarket modification shop, as it is a straight forward install. A lot of my customers go to higher-end shops that normally work on Porsche and Audi, so the prices tend to be higher for installation.
I personally wouldn't bring our parts to Unplugged because that seems weird to do. I wouldn't be thrilled if someone brought a competitor's parts to me!