FMF - Factory 4.1 RCT Complete System (Kawasaki)
SKU: 40639748632

FMF - Factory 4.1 RCT Complete System (Kawasaki)

Sale price$18871.20 Regular price$20968.00
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

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 FMFs 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. FMFs Factory Forward Engineering moves

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

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 40639748632

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M
ms lou
Fort Morgan, US
★★★★★ 4
Pink name brand walking shoes
Size: 7 Wide Big Kid, Color: Fuchsia, Size: 7 Wide Big Kid, Color: Fuchsia
Looks and feel like the real deal. I only tried them on and the soul of the shoes are comfortably soft. Eventhough, they say child shoe, I got a size seven and they fit good on my feet (size 8 in women). Good looking walking shoes .
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Reviewed in the United States on April 25, 2026
C
CEZ
Alexandria, US
★★★★★ 5
Great Fit for Wide Toes
Size: 5 Wide Big Kid, Color: Fuchsia
I should start by saying that these shoes were tested by an adult who happens to wear a child's size 5.5, ladies size 7.5 or 7W, and ordered a size 5W in the florescent pink. These shoes are way more comfortable than the other Saucony sneakers I own. The wide toe bed doesn't put any pressure on the outside of my feet and my pinky toes are loving the extra space. The insole is not removable in these shoes, but I found them to be comfortable enough without an extracurricular insole. I have only used these shoes for active days; running errands, doing chores, walking, but not for running or exercise. My adult feet and body found these shoes more suitable for walking, but for a younger person I would expect these to be great for exercise or daily wear. The color is super vibrant. I don't mind a bright shoe and I own a lot of colorful footwear, but these are shockingly pink. Then you combine that pink with the bright white sole, and it is borderline blinding. I have worn them a few times now and they definitely stand out. These would be a great option for a pink loving person, or someone looking for an eye catching shoe to punch up their wardrobe, but for me they're almost too much. These shoes are on par with my expectations for the brand, but I feel like they have an inflated price point, that most parents shopping for kids athletic shoes may struggle to justify. I know that finding shoes to accomidate wide feet can increase the price significantly, but I still think these shoes would be best purchased on sale.
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Reviewed in the United States on April 15, 2026
C
Caralyn Blanchard
Birmingham, US
★★★★★ 5
Perfect girls tennis shoes
Size: 7 Wide Big Kid, Color: Fuchsia
These shoes have been great for my daughter! They’re lightweight, comfortable, and supportive enough for everyday running around, school, and sports activities. My daughter said they felt comfortable right away with no break in time needed. The bright pink color is really cute in person, and the shoes seem well made and durable so far. They fit true to size and have good cushioning without feeling bulky or heavy.
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Reviewed in the United States on May 13, 2026
S
Siena
Whiting, US
★★★★★ 5
Stylish and comfortable
Size: 5 Wide Big Kid, Color: Fuchsia
I got these for my 9 year old who needed new sneakers. She loves all things pink and instantly loved the look of these shoes. They are extremely breathable which is great for running around and airing out those sweaty feet. The fact that they are wide is perfect for her as well; so many sneakers end up being narrow and confining. They fit great and look great and both mom and daughter are very happy with these!
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Reviewed in the United States on April 25, 2026
J
Verified Purchase
Justa
Grantham, US
★★★★★ 5
Comfortable, durable, affordable...what more could you want? Lol
These fit well and were comfortable for my son...and they lasted until he outgrew them. That's saying a lot for a 9-10 year old boy. Lol. They are a great deal for active kids.
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Reviewed in the United States on February 19, 2026

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