Home » Tony’s Tips » Articles » Cummins Marine 6CTA 450 Diamond with True 2 Micron FiltrationCummins Marine 6CTA 450 Diamond with True 2 Micron Filtration True 2 Micon Filtration for your 6BTA 270/330/370 or 6CTA 450 Diamond SMX Filter head & Fleetguard FF5488 “common rail” last chance filter Cummins Marine 6CTA 450 Diamond with True 2 Micron Filtration Cummins Marine 6CTA 450 Diamond with True 2 Micron Filtration Cummins Marine 6CTA 450 Diamond with True 2 Micron Filtration