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Description
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium 450 Gas Gas/Husqvarna/KTM 2019-2022 045639 1820-1876The Factory 4. 1 RCT incorporates FMF Resonance Chamber Technology both internally and externally Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering moving the muffler closer to the motor to centralize mass The Factory 4. 1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
- The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology both internally and externally
- Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
- The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- Includes MegaBomb header
- Includes spark arrestor screen insert
| 2021-2022 | Gas Gas | MC 450F | - | - |
| 2021-2022 | Gas Gas | EX 450F | - | - |
| 2019-2022 | KTM | 450 SX-F | - | - |
| 2019-2022 | KTM | 450 XC-F | - | - |
| 2019-2022 | Husqvarna | FX 450 | - | - |
| 2018-2022 | Husqvarna | FC 450 | - | - |
| 2018-2020 | KTM | 450 SX-F FE | - | - |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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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
4.9 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Valuable little book
Format: Paperback
LOVE these almanacs! I purchase one every year for the weather forecasts which are eerily accurate, the hair trimming moon phases, & the planting times. Worth every dime!
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Attractive Hard Cover Book
Format: Hardcover
Excellent source of information! Very interesting!
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Great product at a great price.
Format: Paperback
Great product at a great price. I purchased one every year. Lots of fun to read, and surprisingly accurate and insightful.
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Reviewed in the United States on May 20, 2026
★★★★★ 4
Where Knowledge Creates Wisdom
Format: Paperback
A must-read for anyone seeking the title of King/Queen of Minutae. Weather predictions are typically, freakishly spot-on. There is simply a wealth of information in here that you are better off knowing, or will at least make you popular on trivia night. There are some quality vendors that you don't see online advertising in here too. The only drawbacks are the snowfall total in Florida challenging Central Oregon this winter, and the increase in price over last year. Tariffs on paper?
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Good quality book.
Format: Paperback
Bought these because I bought one for my grandmother every year for Christmas. It is good quality, but I have only opened it one time. I got it for sentimental reasons.
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Reviewed in the United States on May 27, 2026