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Old 10-03-15, 22:38
greatescape greatescape is offline
XT-Moto SuperStar
 
Join Date: Aug 2014
Location: chichester
Posts: 2,258
greatescape is on a distinguished road
clarity on filters.?

Hi, can someone explain why DNA filters are referred to as stage 1,2,3..? And why people fit stage 123 not stage 1 OR 2 OR 3.? Obviously it's degrees of filtration, I'm just unsure why people say they have all three! Or maybe I'm being dumb!! Steve