shands,
That is true if you want one of the basic Stage I style intake systems, they are good but if you want the best system get the AFE Stage II system in Pro Guard 7! It totally replaces the battery tray, complete air box and even the rubber intake tube. It has a new battery tray and hold down, and giant conical filter with a 6 inch outlet, that connects to the mandrel designed expansion chamber polymer intake tube that connects to the turbo. You will not get more air in the truck with any other style system than this one. Costs more than most but is worth it in EGT reduction and spool up on the turbo. Give us a call if you have any questions etc.
Mark @ DPPI