I bought a flex pipe to take up the space between my header and cat and now i'm having trouble finding bolts to tie it all together. I've tried every place around me and noone has anything long enough with the right thread pitch to fit my header. anyone have any suggestions where i might be able to find something in say a m10 1.25.

 

you tried ace? home depot, lowes? i've never had a problem finding some that fit.