A couple of things to note. The Microglass should NOT be used on a 24 valve. The case can split because of a start up pressure spike the 12 valves don't have. The Stratapore is supposed to be the best filter for use on all 5. 9s. You might want to check a local big rig shop to get the best price. I pay $7 or a few cents more than that for the LF3894 Stratapore at the local Peterbilt shop.