Experience Powerful Performance with the Factory 4.1 SL 4-Stroke Silencer
The Factory 4.1 SL 4-Stroke Silencer is the ultimate upgrade for motorcycle enthusiasts seeking enhanced horsepower and a refined exhaust note. Designed with advanced engineering, this silencer delivers impressive performance gains throughout the RPM range, ensuring your ride is not only faster but also more exhilarating.
Unmatched Horsepower Gains
With its innovative design, the Factory 4.1 SL silencer provides significant horsepower boosts at all RPM levels. Whether you're accelerating on the track or cruising on the trails, this silencer enhances your bike's overall performance, making every ride more thrilling.
Durable Construction for Longevity
Crafted from lightweight titanium and paired with a robust stainless steel midpipe, this silencer is built to withstand the rigors of off-road riding. Its durable materials ensure that you can push your bike to the limits without worrying about wear and tear.
Optional Quiet Inserts and Spark Arrestor
For those who prefer a quieter ride, the Factory 4.1 SL offers optional quiet inserts. Additionally, the spark arrestor ensures compliance with safety regulations, making it a versatile choice for both racing and trail riding.
Compatibility with Stock or FMF Header
This silencer is designed to work seamlessly with both stock and FMF headers, providing flexibility for riders looking to customize their setup. Enjoy the benefits of superior performance without the hassle of incompatible parts.
Specifications
| Parameter | Value |
|---|---|
| Horsepower Gains | Throughout the RPM range |
| Construction Material | Titanium silencer with stainless steel midpipe |
| Optional Features | Quiet inserts and spark arrestor available |
| Compatibility | Works with stock or FMF header |
| Legal Status | Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available |
This product has variations; for more detailed information, please ensure you have selected the correct variation.
FAQ
Will this silencer make my bike louder?
Yes, the Factory 4.1 SL silencer is designed to enhance the exhaust note, providing a sportier sound. If you prefer a quieter option, consider using the optional quiet inserts.
Is the Factory 4.1 SL compatible with my bike?
The silencer is designed to work with both stock and FMF headers, making it a versatile choice for many motorcycle models. Always check compatibility with your specific bike before purchasing.
Fitment:
| Brand | Year | Model |
|---|---|---|
| Yamaha | 2004 | YFZ450 |
| Yamaha | 2005 | YFZ450 |
| Yamaha | 2006 | YFM700R Raptor |
| Yamaha | 2006 | YFZ450 |
| Yamaha | 2007 | YFM700R Raptor |
| Yamaha | 2007 | YFZ450 |
| Yamaha | 2008 | YFM700R Raptor |
| Yamaha | 2008 | YFZ450 |
| Yamaha | 2009 | YFM700R Raptor |
| Yamaha | 2009 | YFZ450 |
| Yamaha | 2010 | YFM700R Raptor |
| Yamaha | 2011 | YFM700R Raptor |
| Yamaha | 2012 | YFM700R Raptor |
| Yamaha | 2012 | YFZ450 |
| Yamaha | 2013 | YFM700 Raptor |
| Yamaha | 2013 | YFM700R Raptor |
| Yamaha | 2013 | YFZ450 |
| Yamaha | 2014 | YFM700 Raptor |
| Yamaha | 2014 | YFM700R Raptor |
| Yamaha | 2015 | YFM700 Raptor |
| Yamaha | 2015 | YFM700R Raptor |
| Yamaha | 2016 | YFM700 Raptor |
| Yamaha | 2016 | YFM700R Raptor |












