A noteworthy feature of a number of Western Iranian languages, including Kurmanji Kurdish, is the presence of contrastive pharyngeal sounds in inherited vocabulary. These pharyngeals are considered by many linguists working on Kurdish to be the result of contact with Arabic, coming into the language through Arabic loan vocabulary (Haig & Matras 2002). The Arabic contact source of these sounds seems likely, particularly given the fact that most of the Western Iranian languages which contain pharyngeals are in contact with Arabic at present or historically. However, as I demonstrate, the distribution of the majority of contrastive pharyngeals in inherited Iranian vocabulary in Kurmanji does not suggest a mere surface imitation of Arabic vocabulary, but a Kurmanji-internal phonological process modulated by familiarity with the phonetics of Arabic pharyngeals. A newly-identified sound pattern presented here is the association of what are arguably pharyngealized vowel phonemes in Kurmanji with pre-existing labial consonants and constraints determined by Kurmanji phonotactics. Following Blevins' (2017) model of "perceptual magnets", this effect is held to have emerged on a model of Arabic pharyngeals as external "perceptual magnets" for native speakers of Kurdish who had extensive exposure to Arabic sound patterns.