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Matt Peterson Done about 300 miles highway riding since putting it on and it holds up perfectly at high speeds. No rattling or loose feeling. Perfect upgrade.
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Tyler S. COMPLETELY TRANSFORMS THE HELMET!! If you're on the fence just buy it. Super easy to install.
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Alex Dumont Shoutout to killswitch for making these. Finding parts for the K1S can be annoying but this retrofit spoiler is spot on. Quality feels sturdy, not cheap at all.
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j_vance Great product. Fitment is 10/10.
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brian_m03 If you have a K1 you need this. It makes the back profile look exactly like the more expensive AGV models. Tint matches my smoke visor perfectly.