FMF Factory 4.1 Exhaust System with MegaBomb Header - Yamaha YFZ450R
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✓ Fits
Yamaha YFZ450R (2009-2026) and YFZ450X (2010-2011). Complete Factory 4.1 exhaust system with MegaBomb header.
✓ About the Factory 4.1 System
This is FMF's flagship full exhaust system for the YFZ450R. The Factory 4.1 pairs a titanium muffler with a carbon fiber end cap and FMF's MegaBomb header for superior power and performance, with horsepower improved throughout the rpm range. FMF's factory forward engineering centralizes mass to improve handling, so you get more power and a better-balanced quad in one complete system.
✓ Features
- Complete 1-into-1 full exhaust system with FMF MegaBomb header
- Superior power and performance, horsepower improved throughout the rpm range
- Factory forward engineering centralizes mass for improved handling
- Titanium muffler with anodized blue finish and carbon fiber end cap
- Stainless steel header pipe with the MegaBomb module
- Lightweight construction, muffler weighs about 5 lb
✓ What's Included
- One FMF Factory 4.1 titanium muffler with carbon fiber end cap
- One FMF MegaBomb stainless steel header
- Mounting hardware
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information visit www.P65Warnings.ca.gov.
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📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
