You're always raving about how good they are, and think they are one of the best choices because M+H gives out Spec Sheets, even though most (like the Boss) show some pretty bad ISO efficiency specs. So are you now going to bad mouth non-backed Purolators with wavy pleats? I've seen plenty of wavy Purolator and Purolator built filters. Wavy pleats don't matter except on C&P beauty contests, lol.Where did I say wavy Purolator filters are "high quality"... I'll be waiting here for your response showing me where I've ever said that.
If you think I'd not be a bit upset if Boss removed their Poly mesh "Smart Fusion" backing & started causing wavy pleats, Like Fram Ultra's have, then your really stuck in Fram land.
Last edited: