Equipped with three mute valves, to achieve sound control according to the run. By opening and closing the valve in conjunction with the vehicle signal such as the accelerator opening, boost pressure, air flow voltage, etc., while quietness in the idling ~ low speed region is enhanced, both the power feel without stress and high-quality sports sound in the high rotation region. The on / off and volume control from the cockpit can also be performed, and it will perform extremely effective performance in the early morning, late at night engine start or when returning home, and in situations where attention is paid to the neighborhood such as an apartment or residential area.
90 90 tail pipe: 6 60.5 × 4
finisher: 130 130 × 4 (with RH9 logo)