pedZ

There are two types; the stud replacement type and the bolt-on type. The bolt-on type are really easy to install. The stud replacement type are a little more involved.

Here's a link to a DIY for the stud replacement type.

DIY: ** Rear 20mm stud replacement spacers

Also, here's a good thread on spacers overall.

Wheel Spacers 101

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2011 Brilliant Silver Touring/Sport/Nav/6MT --- Build Journal
F.I. SS 18" CBE | Takeda CAI | Z1 25-Row Oil Cooler | Swift Springs | Hotchkis Sway Bars | H&R 15mm DRS Spacers F&R | RJM Clutch Pedal | UpRev Tune