Banks Power Pack Lid

[Giddy-Up]

Not sure if these actually help with power, but having a bigger filter might be worth it to some.
http://www.ebay.com/itm/1980-1986-Ford-F-350-F-250-DIESEL-Truck-BANKS-POWER-PACK-air-cleaner-Lid-6-9L-/181500684028?pt=Motors_Car_Truck_Parts_Accessories&hash=item2a4248a6fc&vxp=mtr