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GT3 arms are simply taking the long view for a track setup. If they save you 1 set of front tires every season they will pay for themselves quickly. It also gives your setup guys ultimate flexibility to get your setup exactly right. I was in your shoes and didn’t do this on my Boxster and paid dearly with shredded outer shoulders on my front tires. On my 987.2 I did this right away and now see a huge difference in tire wear.

Saving $$ is always good, but sometimes paying a bit more up front will save 10 fold over time. I can only give you the benefit of my and many others experience. Your $$ and your choice.