In this study involving ten participants, we simultaneously recorded acoustic and articulatory data using electromagnetic articulography (EMA) to investigate lexical stress production in L2 English among Taiwanese Mandarin (TWM) speakers. Analysis of dynamic time series data uncovered hyper-articulation of lingual articulators and the jaw in stressed syllables, alongside distinct tonal contours related to stress and syllable position. Furthermore, a gestural analysis revealed longer consonant gesture plateaus and longer CV lag in stressed syllables but no difference in gesture velocity.