I went with the Powertrix 25mm in the rear and 20mm in the front. Install was simple and the representative was very helpful in answering all my questions. Unlike most spacers, they are a direct fit over the original studs on both the front and rear.
NOTE: While installing the front spacers be sure to remove the 12mm safety pin (it's really a bolt) which is located on the rotor itself. I was told it is there so you cannot install the wrong wheel on the front of the car (since our rear wheels are wider). Also, I torqued the spacers to 90ft lbs and my wheels to 80ft lbs. I do not want anything falling off
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FYI this is
NOT a DIY. I like to explain how I went about this task because I had a lot of questions and did the research for myself. I'm sure anyone who wants to do this has some questions, so maybe I answered them in this post
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Here are some pics now.
imgur: the simple image sharer -Spacers
imgur: the simple image sharer -Bolted onto the original studs
imgur: the simple image sharer -Front 20mm
imgur: the simple image sharer -Rear 25mm