I can tell you first hand from having center locks on my 360. They are very expensive if something goes wrong. You can not just order the set, you have to have atleast one wheel as a backup in case of an emergency. Likely a front and rear due to sizing. You have to carry around a large torque wrench for a just in case moment. more so because most tow companies do not carry torque wrenches like that. You talking around 400ft lbs of torque. As for weight, it’s very marginal, you wont feel a difference other than noticing the footprint having a wider wheel. While I do love the looks, you’d likely need a conversion kit for these wheels. I’m sure the axles on the GTAm were built around this setup. If the money or the inconvenience isn’t an issue, then maybe it’s a right fit. centerlocks always look amazing.