At Quiet Horsepower, we don’t believe you should have to choose between maximum engine performance and meeting strict track noise regulations. For years, racers, track-day enthusiasts, and builders have faced the frustrating challenge of capping their decibels without choking their horsepower. That’s why we engineered the ultimate solution.
We specialize in designing and manufacturing premium, innovative race car exhaust systems—headlined by our legendary Phase 9 Silencer—engineered specifically to solve your race car noise problems.
Maximum Flow, Minimum Noise: Our silencers use advanced internal dynamics to dramatically reduce decibels ($dB$) while maintaining optimal exhaust velocity and low backpressure.
Track-Tested Compliance: Built by racers, for racers. Our systems help you confidently pass sound checks at notoriously strict venues like Laguna Seca, Lime Rock Park, and local short tracks.
Premium Craftsmanship: Lightweight, durable, and built to withstand the extreme temperatures and vibrations of competitive motorsport.
Whether you are trying to keep the local sound police happy or looking for a custom fabrication solution for a high-decibel track monster, Quiet Horsepower delivers the quiet speed you need to stay on the track and on top of the podium.
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