Cool on the collar, if it's not split, like mine I'll take that.
Yes lap vent. Seen in the lower left of this pic.
http://www.gtoman.com/inventory/1048724709-pic1.jpg
I think I'm missing something on mine as the vent doesnt bolt up right, seems like a plate used to be in between? I'm not sure if it's the bracket in the pic next to one of the vents.