hey i was just wondering if this would make a difference, ive got a vacume pipe and a funnel on one side the funnel will go behind the bottom grill, i probs paint the funnel though also what is this box before the filter, its on the under side of the pipe, the reason i ask is becasue i wanted to get a bigger pipe so i could position the filter nearer to the fron but ive been told to leave it as it is.