DjJoeski87

So I have a lingering problem with P2187 code. Tried cleaning the MAF that didn't work. I know i have an exhaust leak but i can't pinpoint it. I checked the downpipe and i saw the flex pipe was coming apart. I am installing the new one on monday but i honestly don't think that is the problem.

SO my real question is, is it difficult to change the manifold gasket or the manifold itself? if there is a how to please point me in the right direction because i was unable to find it. Thanks for reading!