help with removing exhaust manifold, removing exhaust manifold on 7afe Options

[phelon18]

i cant remove the lower part of the exhaust where the flexi pipe is situated. so far ive managed to shear 2 bolts, which actually helped a little, but i fear if i attempt to loosen the others it may cause more problems and i wont be able to remove the manifold.
is there any advice that anyone could give me?