No sh1t you need a filter , but how many systems run a 10 micron paper element capable of 2000hp flow. Like I said, if you don't run their (expensive) filter, or a 10 micron equivalent paper one, they won't cover the warranty so I am told, which is fair enough as I have seen many injectors clogged from e85 use recently.
Are you going to let me quote you for the set Michael? I get damn good pricing, but there isn't much margin on these from the wholesaler.