Wheel spacers on M4
Discussion
I would be careful as spacers can affect ride and you will need to notify your insurance company. You also need to make sure that the spacers are the right ones for your style of hub, H & R are a reliable product but worth checking what fits the hub of an M4. I had factory fit on my last 991, they were only 5mm but I liked the subtle change to the stance, can't say they made any improvement to handling but certainly no adverse effect on ride.
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