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IM trying to remove the secondary header pipe/connector pipe before the catalytic convertor so that i can install some DC sport headers i bought a while back but never put them on. I've run into my first problem and i cant remove some of the bolts from that long pipe. The ones that connect to the catalytic convertor are really BAD! i sprayed some WD-40 on them 5 times, still won't come off. i think i might have even stripped the hex on them and made them smaller. Anybody have some suggestions?

 
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Try PB blaster, its way better than WD40, then get the gator grip for stripped screws. Or else your ride is screwed.