2009-2016 BMW Z4 3/8-16 to 16mm x 1.5 Custom Shift Knob Adapter Factory Fit Precise Shifting , 2.5si, sDrive, 18i, 35i, 3.0si, M, Coupe, sDrive28i, Sport, Design Pure Traction, sDrive30i, sDrive18iA, sDrive20i, sDrive23i, M Roadster Ambassador 5mm ID) in your 1972-1979

5mm ID) in your 1972-1979 TVR M series

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2009-2016 BMW Z4 3/8-16 to 16mm x 1.5 Custom Shift Knob Adapter Factory Fit Precise Shifting , 2.5si, sDrive, 18i, 35i, 3.0si, M, Coupe, sDrive28i, Sport, Design Pure Traction, sDrive30i, sDrive18iA, sDrive20i, sDrive23i, M Roadster Ambassador 5mm ID) in your 1972-1979Achieve Precise Shifting and a Factory Fit for your 2009 2016 BMW Z4 With All of Our CNC Machined Billet Shift Knob Adapters. These adapters come with common industry standard M16 x 1. 5 threads which fit most of our 1000s of shift knobs. Other adapters based on (M16 x 1. 5) are available in both SAE and Metric formats so you can fit any knob to any car. ADAPTER SIZE 3 8 16 to 16mm x 1. 5 FEATURES Billet Aluminum 16mm X 1. 5 (Common Thread) Jam Nut