SKU: 21471959928

FMF - Factory 4.1 RCT Complete System (Gas Gas)

Sale price$435.38 Regular price$483.75
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 25 - Sep 30

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For Your Every Summer RSVP, with Code: SUMMER15

Description

FMF - Factory 4.1 RCT Complete System (Gas Gas)FMF Factory 4. 1 RCT Complete System (GasGas) The FMF Factory 4. 1 RCT Complete System is built for GasGas riders who want stronger power, a lighter feel, and cleaner throttle response across the entire RPM range. Using FMFs latest Resonance Chamber Technology inside and outside the canister, this system controls sound while improving flow, giving you a noticeable performance boost without excess noise. The shorter muffler design works with FMFs

FMF – Factory 4.1 RCT Complete System (GasGas)

The FMF Factory 4.1 RCT Complete System is built for GasGas riders who want stronger power, a lighter feel, and cleaner throttle response across the entire RPM range. Using FMF’s latest Resonance Chamber Technology inside and outside the canister, this system controls sound while improving flow, giving you a noticeable performance boost without excess noise. The shorter muffler design works with FMF’s Factory Forward Engineering, keeping the weight tucked in tight to the engine for better balance and less chance of damage in a crash. It’s built from aerospace-grade materials and manufactured start-to-finish in FMF’s Southern California facility.

Why We Like It

It gives GasGas four-strokes a more responsive feel without making the bike overly loud. The mass-centralized design makes the bike handle lighter, and the Megabomb header adds smooth, usable power everywhere. The construction is clean, durable, and very “factory”—a top-tier exhaust setup that fits and performs exactly how it should.

Why It’ll Work for You

If you want stronger low-to-top power and a lighter, more balanced feel, this system makes an immediate difference. The patented chamber and canister designs increase flow and manage sound better than a standard slip-on, while the shorter length helps keep your exhaust out of harm’s way. It bolts on easily, works with tuning inserts or a spark arrestor, and is optimized specifically for GasGas engines.

Key Features

  • Latest FMF Resonance Chamber Technology (internal + external)

  • Patented core shape reduces sound while maintaining maximum power

  • Patented canister shape increases internal volume for better sound absorption

  • Patented chamber design refines exhaust pressure and improves flow

  • Factory Forward Engineering for mass centralization and reduced crash damage

  • Application-specific tuned exhaust core

  • Rear endcap accepts tuning inserts or spark arrestor

  • Includes Titanium Megabomb header for optimized power output

  • Carbon fiber end cap

 

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: 21471959928

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4.5 ★★★★★
Based on 5 reviews
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Connie W
Lowell, US
★★★★★ 5
Best pillow ever
Style: Standard – Low
I have to say, after decades of buying all sorts of pillows, trying to work for me and my short neck, this is THE one. I bought the low profile ones and OMG it is just perfect for me. I'm finally getting a good nights sleep without fighting a pillow that is too firm or doubling a pillow that is too soft and thin. It's also not as heavy as other memory foam pillows I've tried. I hate a heavy pillow. Yet, it isn't so light weight that it gets pushed off the bed easily if you change positions a lot during the night.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
C
Verified Purchase
Cynthia Gordon
Chelsea, US
★★★★★ 5
Perfect firmness
Size: Queen (Mid Loft), Number of Items: 1
This pillow is great! Not too soft, not too firm. Holds its shape.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
J
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Jill Brock
Chelsea, US
★★★★★ 5
The best Pillow ever!
Size: Queen (Mid Loft), Number of Items: 1
I am a life long latex pillow user! The one i typically use is 150+. This pillow is better and less expensive . It has just enough firmness but still soft . I am a side sleeper and it supports my neck perfectly . I am going to buy three more!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 13, 2025
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Verified Purchase
Gay Petro
Louisville, US
★★★★★ 5
Comfortable and light weight
Size: Queen (Mid Loft), Number of Items: 1
Perfect. Just what we wanted
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
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Verified Purchase
HF
Los Angeles, US
★★★★★ 4
Make sure you're not allergic to latex
Size: Queen (Mid Loft), Number of Items: 1
This pillow is so soft and bouncy! After using it for a couple of nights, I felt that it wasn't high enough for me, as I'm a side sleeper. So I started using it with another thin pillow underneath it. That worked fine and I was happy with it until I started developing itchy skin on my neck, scalp and ears! Now, to be fair, this isn't the pillow's fault! I just didn't know I was allergic to latex! I unfortunately had to return it.
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Reviewed in the United States on April 10, 2026

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