Quote Originally Posted by mudski View Post
There is no direct reference but you can simply go by an aftermarket website for their branded version. They have to make their filters to OEM spec so it will be pretty accurate. I've been if the filtration industry for a long time and done this a billion times over. Looks like yours is 7 micron, so would go a 30 or 15 micron before the original filter.
Ah, roger!

I've just ordered the 30 micron fuel manager kit to use as a primary (and a set of injector pump seals), apparently the crd injector pump has a habit of leaking around the 200k mark so maybe it's just time for some love