What makes the Factory 4.1 RCT muffler different from other mufflers?

The Factory 4.1 RCT uses FMF's advanced Resonance Chamber Technology both internally and externally. Its shorter design also helps centralize mass and reduces susceptibility to crash damage, while the aerospace-grade titanium construction ensures durability.

What is the Rapid Tuning System (RTS)?

The Rapid Tuning System (RTS) is a feature that allows for adjustments to fine-tune the muffler's performance. This helps you optimize the exhaust output for your specific riding conditions or preferences.

Does this muffler come with all necessary installation hardware?

The manufacturer's description focuses on the muffler's construction and performance features. It is recommended to consult the installation instructions or contact FMF Racing for details on included hardware.

Specifications

Brand: FMF Racing
Part #: 041546

FMF Racing Honda TRX450R 04-14 Anod Factory 4.1 RCT SO Muffler w/ R. Carbon Cap

Name: FMF Racing Honda TRX450R 04-14 Anod Factory 4.1 RCT SO Muffler w/ R. Carbon Cap
Brand: FMF Racing
SKU: fmf-racing-fmf-racing-honda-trx450r-04-14-anod-factory-4-1-rct-so-muffler-w-r-ca-t14-686696
Price: 743.03 USD
Availability: BackOrder

$743.03

On Backorder — Expected to ship by Apr 28, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits Honda TRX450R models from 2004-2014.
Features FMF's latest Resonance Chamber Technology (RCT) for improved exhaust flow.
Shorter overall length helps protect against crash damage and centralizes mass.
Constructed from aerospace-grade titanium with a blue anodized finish.
Includes a carbon fiber end cap for a distinctive look.
Offers massive power gains throughout the entire RPM range.

This muffler is designed for Honda TRX450R models from 2004 to 2014. Please verify fitment for your specific vehicle.

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About this part

Product Details

FMF Racing is well-known for making high-performance exhaust systems, and this Factory 4.1 RCT SO Muffler is a prime example of their work. This muffler is specifically designed for the Honda TRX450R models from 2004 to 2014, aiming to give you a significant boost in power across the entire RPM range. If you're looking to get the most out of your ATV's engine, this part is built to help you achieve that.

What sets this muffler apart is its construction and technology. It uses FMF's latest Resonance Chamber Technology, both inside and out, to help tune the exhaust flow. The design also makes the muffler shorter, which not only helps protect it from damage during a crash but also moves it closer to the engine. This centralization of mass can improve the overall handling and feel of your ATV. It's made from aerospace-grade titanium, meeting FMF's strict standards, and features a striking blue anodized finish on the titanium body with a carbon fiber end cap. Everything is manufactured right at their Southern California factory, ensuring a well-built product.

This muffler also includes the Rapid Tuning System (RTS), which allows for adjustments to fine-tune the performance. When installing this, you'll want to refer to the manufacturer's instructions for the best results and to ensure proper fitment and connection to your existing exhaust system.