SP is a Monsey euphemism for ‘special processing’ = Bais Yosef.
It has nothing to do with Pesach as it is around all year.
If you’re talking about the vacuum packed ‘smoked’ dried salami-like sticks, that section is covered up for Pesach. I was in the store yesterday. (They’re are good and come in various ‘flavors’.) Youcan phone the store at 845.425.2266 .
If you’re desparate for dried salami, Monsey Glatt has mild dried salami which maybe good for Pesach. They hang at the back end, far left of the fresh meat showcase if you’re facing it, near the fish. You should check on it’s appropriateness for Pesach. It would be covered if not OK. If it’s OK it would have a KP on the tag, or some other indication about Pesach.