FMF - Factory 4.1 RCT Complete System (Kawasaki)

FMF – Factory 4.1 RCT Complete System (Kawasaki)

The FMF Factory 4.1 RCT Complete System brings championship-level performance, power, and precision engineering to your Kawasaki. Designed with FMF’s exclusive Resonance Chamber Technology™ (RCT) both inside and out, this system smooths exhaust pressure, boosts power across the rpm range, and cuts sound levels — all while delivering that crisp, unmistakable FMF tone.

FMF’s Factory Forward Engineering moves the muffler closer to the motor, centralizing mass for improved balance and handling. The shorter overall length helps prevent crash damage, while the patented canister shape increases internal volume, allowing more sound-absorbing material without restricting flow. Built entirely from aerospace-grade materials and handcrafted in Southern California, the Factory 4.1 RCT is made to perform, look, and sound like a true factory system.

Why We Like It:
It’s FMF’s top-shelf system for good reason — lighter, stronger, and noticeably more responsive. The titanium build and carbon end cap look straight off a race bike, and the sound is pure FMF: clean, deep, and aggressive without being obnoxious.

Why It’ll Work for You:
This system gives your Kawasaki more usable power and a smoother throttle feel from low rpm to wide open. The improved flow helps the engine breathe easier, while the mass-centralized design keeps the bike stable and responsive. Plus, the included 94dB insert lets you fine-tune sound for different tracks or trails.

Variants / Options:
Includes complete header, mid-pipe, and muffler assembly. Compatible with optional spark arrestor and tuning inserts.

Key Features:

• Latest FMF Resonance Chamber Technology™ (RCT) for balanced flow and power
  
  

• Patented core shape lowers sound without sacrificing output
  
  

• Patented canister design increases internal volume and durability
  
  

• Factory Forward Engineering improves mass centralization and handling
  
  

• Titanium and carbon fiber construction for strength and weight savings
  
  

• Innovative rear end cap for easy insert and spark arrestor changes
  
  

• Tuned core specs for each specific model application
  
  

• Includes 94dB insert for sound compliance
  
  

• Handcrafted in Southern California, USA