Cylinder head dyno shoot out

Yep! That’s the episode! Lived the two episodes. That was cool IMO.


What size header?!?!
And exhaust?
1-3/4 dyno header. Don’t remember if it had an extension on it or not. Probably not.
Edited to add;
Just went back and checked the engine masters episode my engine was on, S6 E23 and it did have an extension on the header. Looks like about 18”.