Summit is a great store but those tech guys aren't so helpful.
They do give great returns, I bought some thin head gaskets but they were just steel with a rubber coating. Well I took them out by breaking the seal and was going to used them. Showed them to my shop that was milling the heads and he thought the .038 gaskets seal better for a long time. Summit return my $$ and also shipped me new head bolts without charging shipping again.
So, if I was you, I order a few drop base filters, diff. brands and ship back what you don't like. Sure it cost you $6-$8 but you get the one that fits the best.