what are these 2 bolts I got in my ace header box?
 

I found these in the box, what are they for? Did I get bonus bolts? Also what are the torque specs on everythig? I cant find any instructions

https://imgur.com/a/o0A1xnz

That's how you attach the front-pipe to the header - the flange is threaded.

turns out the fit on the over pipe. so i guess they are for the overpipe to mid pipe. weird how they were just floating in a box

It's the right one.

So what size are those? Purchased a used ACE header and it appears the seller didn't include any. Trying to remove the studs from the stock overpipe... not sure if that's the way to go.

Not sure the studs will work, but you should be able to find bolts that work at an auto parts store. Bring the op portion of the header in, find bolts that fit.


Honestly no idea what grade is recommended for the exhaust.

Thanks. And you were right - those studs wouldn't work. Threads in the ACE OP are M10x1.25 so were easy to find at the hardware store. If anyone reads this down the road, I went with 30mm length, which proved to be about perfect.