Pump 3G Zero Stim - Caffeine-Free Pre-Workout Pre-Workout • Next Generation 375g | 50 Scoops 5g Citrulline | 3g AAKG | 3g Creatine | 2g Beta-Alanine Pump 3G Zero Stim is the stimulant-free version of our Pump 3G, now more concentrated than ever and stacked with a host of the most popular and researched ingredients to help improve pump, focus and performance. Pump 3G was formulated whilst having the pump factor prioritised at all stages of development in order to maximise gains without a potent stimulant dose.