Exhaust Porting - Matching Headers FORD 5.4L

Exhaust Port Grinding And Matching FORD 5 4 Liter Heads Gaskets SS Headers. I trying to gain just a little extra flow on my exhaust headers and pipes. It's not much but since the enlargement is at the outer edge of a circle, it will be a fair improvement. You don't want to take too much material away that you open into a water passage which would not be good. Mostly what I've done is to remove the carbon and just expose the metal beneath, The n grind a little additional in the direction that needs to be opened to better match the header, The first inch into the port is pretty safe, it's metal with no water jacket. Any deeper and you need to pay attention, leave it to a professional. I do have head porting experience and know when to stop. After this, we mount the heads to the engine block with header manifolds on, over the Cometic MLX .032 multilayer gaskets rated for over 1000 horse power. Hopefully these expensive gaskets will not fail like the Fel-Pro did. We are also going to weld closed the rear water passages because they will never be used and are only there to leak.