FMF FACTORY 4.1 RCT ALUMINUM SILENCER WITH CARBON END CAP - CLICK HERE - www.rockymountainatvmc.com/parts/fmf-factory-4.1-r…

We installed the FMF Factory 4.1 silencer on our 2020 Yamaha YZ250FX. We want to replace the OEM silencer that came from the Yamaha Factory to get a spark arrestor screen for riding on the USFS trails. Also, its lighter and gives you more power.

‪@FMFRacing1973‬ ‪@YamahaMotorUSA‬
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If you're a rider looking for a silencer that's packing stellar looks and increased performance from a staple brand in motorsports, the FMF Factory 4.1 RCT Aluminum Silencer With Carbon End Cap is an option that we think sits close to the top of the class.

FMF distinguishes its 4.1 RCT from other silencers from the start by using premium materials and a refined design developed over years of industry experience. Features like FMF’s unique Resonance Chamber Technology™ (RCT), a specialized chamber that sits at the front of the slip-on, lower your exhaust decibel level so it complies with FIM 2M max sound tests and the stringent AMA sound requirements so you can get onto any trail and into any race where noise level regulations are enforced.

While the RCT lowers sound, what's better is that it won't eat up your bike's power either. In Fact, the RCT chamber design refines and enhances exhaust pressure to give your bike gains throughout the rpm range. Power increases are tunable as well with the end cap housing FMF's new Rapid Tuning System (RTS) that lets you swap between race tips (sold separately) and the 94 db Quiet Core insert. With this level of performance and versatility FMF's Factory, 4.1 RCT Silencers really do serve as an excellent option for all types of dirt and off-road riders.

Specs:
Premium aluminum alloy canister body
Genuine carbon fiber composite end cap
Rapid Tuning System (RTS) allows for swappable end cap inserts (sold separately)
Compatible with FMF and OEM headers
Resonance Chamber Technology (RCT) lowers sound and refines exhaust gas pressure
Increases performance throughout the rpm range
Efficient design centralizes mass and makes the silencer body less prone to damage in a crash
Increased packing material volume in main body canister
Meets AMA and FIM sound regulations and requirements
Quiet Core 94db end cap insert included
USFS spark arrestor included and pre-installed in silencer
Easily removable end cap for quick servicing and repacking
Available in various finishes and end cap materials