Can someone explain to me what the A pillar is and the B pillar???
Thanks.

 

A pillar runs up the windshield and B pillar is where the front door latches.

 

The A pillar is the pillar that extends up from the dash area to the roll bar. Essentially both sides of the windshield. The B pillar is the extension that goes up from the floor to the sound bar. It is the section on either side of the front seats that attaches to the roll cage.

 

How about a pic...

 

There ya go. Just proves a picture is worth a thousand words.