Description
Noise ordinances and neighbor relations don’t have to cost you performance. The Pro Circuit 4″ Quiet Insert reduces exhaust sound without compromising engine efficiency, giving you the ability to ride in noise-restricted areas while maintaining full power delivery. Whether you’re navigating residential zones or early morning sessions, this insert lets you enjoy your bike without the sonic trade-off.
- Fits 4″ exhaust systems
- 1-3/4″ inlet diameter
- Significantly reduces noise
- Maintains power output
- High-quality construction
- Bolt-on installation
- Durable materials
- Noise-restricted compliant
- MPN: PC4012-0008
- 2007-2008 compatibility






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