which headers are you running ?
the header flange is threaded ?
normally the bolts pass throught the header flange and your secure them with a nut or the studs are pressed into the header flange , I have had to use smaller bolts and havent had a problem , or you can just use a longer bolt and put a nut onto it . or if you are unable to tap the flange braze a nut with the proper thread onto the flange.
your talking about the header flange to h-pipe bolts right ?
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89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .
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