I've read through a lot of talk about spacers, but want to make sure I get the correct info for my car and situation specifically before ordering anything

For a 07 C2 with narrowbody turbo rims (67 offset), If I install 15mm spacers what length lug bolts would I need to purchase? And if I put 5mm on the front the stock bolt would be fine correct? WHat is the length of the stock bolts?

 

Any spacer kit should come with the proper sized (longer) bolts. Mine did.

But if you have spacers without bolts, stock bolts have a 42mm shaft length, so you would need bolts that are 15mm and 5mm longer for the spacers you asked about. (I just sold my set a while ago or I could measure the bolts to confirm exact lengths).

But I have never seen a spacer kit advertised that did not include new bolts.