the sheer strength of a grade 8 is what matter in this application. and if your car makes enough power to sheer a grade 8 bolt Wich happens to sheer at WELL over 120,000 PSI then honestly a stock bolt would snap instantly. go get a grade 8.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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