I've just put the filter set on from Dieselsite and it installed very easily. At the same time I drained, flushed and refilled with the Purple antifreeze with the proper SCA's and replaced the OE tstat with Dieselsite's 203 degree and billet housing. My 01 F350 7.3 has 170,000 on it and I plan on doing a LOT of RV towing in the future and wanted the best chances for engine longevity. Last week I ordered and installed Dieselsite's external transmission filter on my ZF6 after changing over to Synthetic Mercon.