If you have the money to do C/C plates get them. They are well worth the money and the right way to properly align a lowered car. I'm running camber bolts, which are sufficient but not ideal. Especially if you plan on doing any track time. After I did an autox day my alignment is off. The bolts are known to wiggle out of alignment sometimes.
I bought Vorshlag C/C plates and they are going on this weekend. They look amazing. If you get C/C plates you do not need GT500 mounts. They take the place of them.
Bottom line is you don't "need" C/C plates but C/C plates are 100x better than bolts.
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