Ok, so I compared a B16 exhaust manifold gasket to an h22a exhaust manifold gasket, the B16 exhaust port is at least .150 bigger!!! WTF? This makes absolutely no sense to me, the h22 is .6 liter bigger. I understand that the B16 is a more efficient motor (100 HP per liter) but still. I was very surprised, guess I will have to do some porting! We'll see. I am just wondering what ya'll think about this.