Theres a special process to welding CM correctly. Main reason why its used is lighter weight cause you can run a thinner wall. I bought mild steel for mine, I only wish I had paid the extra and gotten DOM vs the ERS I got, but no biggie. I believe most drag racing sanctioning bodies also require a replacement or re-cert every few years with CM.
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Floridaracing.org Tenative Schedulealso check out the Auto-x Event Schedule
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