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Free standard shipping on orders over $149
We ship to the lower 48 United States. Orders over $149 ship free; a flat rate applies under $149. Estimated delivery dates are shown at checkout based on item availability and the shipping option you choose.
We text or call to confirm sizing & fitment before we ship.
Every Factory SuperBike order includes a free expert check from real riders. Before we ship helmets and gear, we text or call to confirm your size and fit; for parts, we verify fitment to your bike. This is why we don't have to guess and you don't have to gamble.
Helmet & gear orders: reply to our text to confirm and your order ships, typically same day. No reply within 48 hours and we'll call you. Questions now? Call or text (503) 832-7336.
The Akrapovič V-TUV385 is a noise damper insert for the Akrapovič Evolution Line exhaust on the 2025-2026 Kawasaki KX450 and KX450X, developed specifically for racetracks and events that enforce a 109 dB/A sound limit.
This is the part that gets you past the sound meter. Motocross and off-road events almost universally test at 109 dB/A, and a full Evolution Line system without an insert will not pass. Riders find this out at sign-on, with the bike already off the van. Fitting the damper drops the system to the required level; removing it restores full output for practice or open days.
It is an optional component of the Evolution Line rather than a universal silencer insert — it is sized to that system on this specific machine, so confirm you are running the Akrapovič Evolution Line before ordering.
Fits the 2025-2026 Kawasaki KX450 and KX450X running the Akrapovič Evolution Line exhaust. Check the sound limit published by your race organisation or venue before your event.
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