FMF Factory 4.1 Exhaust System with Megabomb Header (Titanium/Blue/Carbon) 044438 - Yamaha YFZ450R / YFZ450X 2009-2026

Product Description

Upgrade your ATV with the FMF Factory 4.1 Exhaust System featuring the Megabomb header, delivering superior power and performance for the Yamaha YFZ450R and YFZ450X. This complete exhaust system is specifically engineered to improve horsepower output throughout the entire rpm range, giving your machine the edge it needs on the track or the trail.

Built with factory forward engineering, this setup actively centralizes mass to noticeably improve the handling characteristics of your ATV. Constructed with a durable stainless steel pipe, a lightweight titanium muffler with a striking anodized blue finish, and a resilient carbon fiber end cap, this exhaust delivers a massive reduction in weight while maximizing exhaust flow and long-term durability.

Top Features: FMF Factory 4.1 Exhaust

• Complete 1-into-1 exhaust system includes both the FMF Megabomb header and the Factory 4.1 muffler.
• Muffler features full titanium construction with a blue anodized finish and a lightweight carbon fiber end cap.
• Header pipe is constructed from rugged stainless steel to withstand aggressive off-road riding conditions.
• Factory forward engineering strategically centralizes mass, improving overall maneuverability and handling.
• Significantly improves horsepower and throttle response throughout the entire RPM range.

Please review the detailed compatibility data below to ensure an exact fitment match for your ATV before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this system include the header pipe?
A: Yes, this is a complete 1-into-1 exhaust system that includes the FMF Megabomb stainless steel header pipe along with the titanium muffler.

Q: What materials are used in this exhaust system?
A: The header pipe is made of stainless steel, the muffler canister is titanium with a blue anodized finish, and the end cap is crafted from carbon fiber.

Expert Pro-Tip: When installing a full exhaust system like this on a modern fuel-injected ATV like the YFZ450R, you will need to remap the ECU or install an aftermarket fuel controller to optimize the air/fuel ratio for the increased exhaust flow and prevent the engine from running too lean.

Recommended Pairings:

• Yamaha YFZ450 Performance Parts & Upgrades
• ATV & Quad Performance Parts
• Off-Road Lithium Batteries

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