Don't do a burnout with radials!!. If you do anything with regular radials on do as Jeff said before and just spin them over once or so to clean them off. With regular radials the hotter you get them the less they grip. Also when you launch with radials on be real careful when you launch, because when radials break free they don't catch back-up like slicks do. So be prepared to pedeal it if you break them free.
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2000 Mustang GT