Anyone have an opinion?

They are both good products.  My preference is DRD.

Drd all day long.

If fmf was an option would the preference still be drd ?

For me, yes.

Have fmf and love it with insert

On a value basis, yes.  The FMF costs upward of 150% of the price of the DRD stainless (with a removable spark arrestor), and offers no real advantage other than a few ounces of weight.

My full system Dr D. on my 09 made the oil filter cover and bolts hard to remove. It also interferes with my emperor racing skid plate. Runs great though.

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