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I know plenty of cars that use.. that can feel the difference as they track their cars
Neither am I. But I do know that the chassis on these cars are stiff enough that a bolt in roll cage won't make a difference. On other vehicles, sure, but not onn these vehicles. Just my $0.02
If you are interested in the appearance alone, then I would just find someone that can fab one up locally for you. If it's for performance, forget about the bolt-in crap. Even if it is aluminum, the added weight would more than negate any benefits.