Hey there! I'm having an extremely hard time getting the rear nut on the passenger side exhaust manifold off. Any hints!?

Thanks

 

I got it from under the car. I also got all of the other bolts out first and then yanked up and down on the exhaust manifold. This broke the rust seal that the manifold had with the head. It also turned the bolt loose a bit. I only discovered the effectiveness of this cave man move when I became engulfed in anger. I coul dnot get it to break loose. When I did I just got the bolt out from under the car. PB blaster is your friend.