Tips for removing headers

I have removed the bolts from the block, but now i cant seem to find a way to get in there to remove the bolts from the h pipe, any ideas?

Jack up the car and support with stands. Get under it with a 1/2'' drive and some long extensions a few 6's and a 10 will do... You can use 3/8'' but make sure you soak them in pb blaster and let them sit first. You may need a breaker bar.