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Designed to come off throttle clean and improve the low-end grunt, then mellow the mid-range hit, providing controllable power that still has lots of pull. The top pumps out more power than stock, with more over-rev. Hard-anodized aluminum muffler shell with stainless steel tubing (ultra-lightweight titamium tubing also available for YZ450F). Features cone-style outlet cap and inlet cone to keep the muffler as forward as possible for centralized mass. Meets 102 dBA requirements. Completely rebuildable. Head pipe uses the stock heat shield.
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