FMF - 044483 - Factory 4.1 RCT Exhaust System - '26 Yamaha YZ450F
FMF's Factory 4.1 RCT for the '26 Yamaha YZ450F achieves a shorter overall length that's both less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass. Built entirely from aerospace-grade materials — natural aluminum with a carbon fiber end cap — it's engineered for massive power gains across the RPM range via FMF's Rapid Tuning System, and manufactured 100% at the Southern California factory.
Features
- Achieves a shorter overall length that is less susceptible to crash damage and complementary to 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 exacting specifications
- Natural Aluminum with Carbon Fiber End Cap
- Massive Power gains throughout the RPM range
- Rapid Tuning System
- FMF uses the highest quality proprietary blend stainless steel made especially to standards
- Manufactured 100% at the Southern California factory
Specs
- Muffler Material: Aluminum
- End Cap Color/Finish: Black
- Pipe Material: Stainless Steel
- Muffler Color/Finish: Gray
- End Cap Material: Carbon Fiber
- Muffler Color/Finish: Anodized
- Type: Race
- Style: Megabomb
- Units: Each
- Model: Factory 4.1 RCT
- Riding Style: Off-Road
- Product Name: Exhaust System
Frequently Asked Questions - FMF - 044483 - Factory 4.1 RCT Exhaust System - '26 Yamaha YZ450F
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
