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Was in the dealership today, they had 3, C4S's on the floor. Noticed on two of the cars the front and rear lug bolts were different. The fronts were the standard zinc plated type with the dimple in the center and rears were nicely made, machine finished bolts, flat face. The third car had matching set, all zinc bolts. Any idea as to why the difference? Sales guy had no idea, didn'd even notice difference till I mentioned it.


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They must have had their rear wheels spaced.

Then you get another set of longer ones, because the original ones are too short.

However no idea why they don't have the dimple.

Edited by kubota

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I had a H&R spacers added to my rear and they came with flat headed bolt to accommodate the length. They don't make the Porsche, dimpled bolt for that length. You should ask them what size spacers were put in.

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15 mm spacers and larger have nuts, no bolts. The spacer is fixed with the original bolts on the hub.

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