OEM AC Delco Oil Filter for the 6.6L Duramax.
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This is all I run on my mostly stock lb7. 5" exhaust with 4" down, cat fuel filter, k&n air filter, boost valve, raptor 100 lift pump, and a 50 horse tune. I only use amsoil full synthetic 15w40 oil never had any problems, pressure is always perfect. Plus free cuzies! Lol