drip pan 18_9/16 x 23 or 28_7/8"

This part is also known as: NAPN010-0781, N010-0781, B0FLSJ521F

Does your part fit?

Many replacement parts look correct but won’t fit your model. This grill part fits the following models:

Napoleon:
BILEX485-1, BIM485, BILEX485