If your just getting a Juice it is just 2 plugs. If your getting an Attitude you need to drill and tap the manifold. Not a big thing to do and if you really can't do it yourself any good speed shop should be able to do it.
To add to what kennedy added to Larry's post: Check out Hoot's how to on installing the pyro probe. It's the same place and method Edge recommends, but with more detail. Just make sure you've got a small drill, maybe a regular corded one, my 18v DeWalt was a little big for the job. I'm sure you can pull it off on your own.
No it adjust on the fly on the controller itself .... You can pick one of 5 levels via up down arrow buttons .... You no longer need to use go peddle and shift indicator or tow haul button to acheive desired level of performance ....
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