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For AX you should be fine, but some orgs dont allow M helmets for HPDE, some will look the other way. They aren't interchangeable. The two biggest factors is that they are designed for different types of impacts and that a motorsport helmet has a fire resistant lining.
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Well weathered leather, hot metal and oil, the scented country air.
Sunlight on chrome, the blur of the landscape, every nerve aware!
2014 328ix EBII - Sport AT, Light Pkg, Blk Dakota, Moonroof, Navigation, Heated Seats, HK Audio, Driver Assist, Sport Pedals, Dinan Springs, Bilstein B8s, M-Performance BBK
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