DIY plugs really should just be a temporary fix. As soon as you can, always have a tire shop do a patch/plug from the inside.
I would and have autocrossed on a plugged & patched r-comp tire as well as a plugged & patched street tire. I would be less than enthusiastic about doing a track day on a plugged tire, but my guess is it would be fine as well.
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kabel
Orlando - 99 BMW M Coupe (autocross toy), '11 Mazdaspeed 3 (dog hauler), '99 10AE Miata (the new daily driver)
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