Hey all this may be an over beaten question but I was doing my research and found that there are square deckplates. Has anyone ever tried these it seems like the entire front of the airbox could be cut out and put in a square/rectangle deckplate and have even more gains. What do you think?

On another note, if I do end up getting a round deckplate what size, seems most people use 4" why not 5" or 6"? Thanks everyone!

 

most use 4'' and if there supercharged they go with the 6''