The thickness varies slightly along the length of the bar. Even though the Sway Bar Diameters sticky in the Brakes & Suspension subforum indicates that all Nismo rear sways have a thickness of 25.4mm, I get an average measurement of approximately 26.7mm. I can only speak for 2015+ Nismo models.
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2017 370Z Nismo Tech 6MT PART OUT IN PROGRESS
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