the bolts have seized.

[JJ 1.0l]

i went to take my manifold of the other day to fit my janspeed one got all the nuts/bolts undone but when it came to take the nuts of at the cat (A and B in picture 2) they wouldn't come off. i tried wd40 but no lucky so i was wondering what size are the bolts? as i am going to just cut them off

also when i was trying to undo them i was under the car and as i was trying to loosen them heard a clunk noise thought nothing of it until i started the car up and it sounded very noise. then this is what i found (pic 1):O i couldn't beleive it.

so i am going to buy a univeral back box and connect it to the bit of pipe that broke, however would this be worth it with that pipe, would it be to restrictive?

Jordan.

 

[ollyc98]

I just stuck a back box on my standard pipe and it was fine.

 

[Craig]

Those nuts are a burger if they haven't been off recemtly, I had to wedge my exhaust with a jack and some bricks and then use a 24" breaker to undo the nut.