I was just wondering about the b-piller if they go by the entire doorjam or a specific location,
because i have a curved doorjam and the top 4"s of my sub extend past the top of the jam any help would be great thanks, I'm relativly new to this

 

They go by the entire door jamb.

If your subs are past your vehicles B-pillar you're going to be moved to the Monster class for dbDrags.

 

if you run a piece of string from b pillar to b piller and slid it up and down in the door jam and it touches nothing, you are considered behind the b pillar.