Found this info on another site. Posting here for future reference.
The main reason why you want the CAT High Efficency Filters is they Filter Down to 2 Mircron, block water, and handle frozen/gelled fuel better.
Cheapest easiest, simplest way to add a CAT Filter is to purchase a Permacool Fuel Filter / Water Seperator Kit ($35.88 at Summit Racing.) and a CAT 1R-0750 filter from a CAT dealer for about $11.00.
Permacool makes 3 filter heads that use the 1-14 Thread (which is what CAT uses on some filters).
Perma-Cool 88864 High Flow Filter Head (3/4" NPT Inlet / Outlet)
Perma-Cool 81794 High Performance Filter Head (Dual 1/2" NPT Inlet / Outlet)
Perma-Cool 81074 Universal Fuel Filter/Water Separator Kit
The CAT filters Thread up to the Permacool Filter heads Perfectly.
CAT Filter on a Permacool Head
I have used / expeimented with different Perma-Cool Heads and CAT Filters with my Vegoil Setups.
The 1R-0750 Filter should flow plenty big enough for any 8 Cylinder engine but, if you want to go nuts get a 1R-0749 Filter ($16.00 at a CAT Dealer), it's huge and also works with the permacool head. I have one on the Permacool #88864 High Flow Filter Head on my Vegoil Prefilter.
It works OK but, clogs pretty quickly so I will probably not keep using it on the pre filter. I am looking at some CIM-Tel filters to try on the prefilter next.
The two micron filters are used usually as secondary filters on newer rigs and there is usually a higher micron rating water seperator / filter before the two micron. Like a 175-2949.
For the past couple of years though CAT has been subbing the 1R-0749 and 1R-0750 for higher micron rating filters like 1R-0712 (10 micron) that are the only fuel filter used on older rigs, read this page. So they can be used in single.
I have seen allot of debate on different diesel sites that other manufactures X-ref filters aren't as good as CAT's. At $11.00 and $16.00 a pop for the Original CAT's I'll stick with them but, a while back I did make up a Cat Filter X-ref in case I ever needed a filter quick.
Caterpillar Primary Filter/Water Separator 175-2949 (threads 1-14 UNS-2B )
Fleetguard FS19683
Donaldson P551743
Baldwin BF1268, BF1214
Fram PCS5063
Wix 33005
Luber-Finer LFF8030
ACDelco TP1002
NAPA FIL3005
Purolator F60026
Hastings FF864
Caterpillar Secondary Filter 1R-0749 (2 Microns) (threads 1-14 UNS-2B )
Fleetguard FF5319
Donaldson P551311
Baldwin BF7587 (BF614, Standard Version, BF7633, Short Version)
Wix 33674
Luber-Finer LFF2749 (High efficiency version of LFF5823B)
ACDelco TP1322
Fram P8335
NAPA FIL3674
Purolator F75185
Hastings FF1056 (FF1007, Standard Version FF1079, Short Version)
Caterpillar Filter 1R-0750 (2 micron) (threads 1-14 UNS-2B )
Fleetguard FF5320
Donaldson P551313
Baldwin BF7633 (BF7587, Long Version)
Wix 33528
Luber-Finer LFF3347
ACDelco TP1326
Fram P8334
Purolator F65213
NAPA FIL3528
Hastings FF1079 (FF1056, Long Version)
found on this site.
http://www.gm-diesel.com/diesel/vbull/showthread.php?t=15406
