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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 Yoshimura Street Sound Insert Kit is a removable baffle that drops into the outlet of a Yoshimura RS-3 or TRS muffler to reduce exhaust noise.
Aftermarket mufflers are loud by design, and there are places where that becomes a problem — trackdays with a dB limit at the gate, an early morning departure through a residential street, a riding area with a posted noise ceiling. The insert lets you drop the output without taking the exhaust off the bike.
It fits from the outlet end and secures with a single fastener, so it can be fitted or removed at the trailer in under a minute.
This is a sound insert, not a spark arrester. It reduces noise only and does not meet USFS or BLM spark arrester requirements. If you ride on land where a spark arrester is required, order the correct Yoshimura spark arrester for your muffler instead.
Fits Yoshimura RS-3 and TRS mufflers. Confirm your muffler model before ordering — inserts are not interchangeable between Yoshimura canister families.
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