The FMF PCIV-2 slip-on exhaust is designed to enhance performance on Yamaha YFZ450 models from 2004 to 2013. Featuring a versatile reverse cone megaphone design, this exhaust can be run open for closed-course racing or with discs for off-road riding, offering riders flexibility based on their riding needs. The modular end cap system allows easy tuning, with options including a standard Hi-Flo 2-inch end cap, a 1-3/4 inch end cap for smoother power delivery, and a spark arrestor module for added safety and environmental compliance.

Constructed to improve exhaust flow and sound, the PCIV-2 provides substantial power gains while maintaining a lightweight profile. Its U.S. Forestry-approved spark arrestor makes it suitable for off-road use, ensuring compliance with environmental regulations when configured appropriately. The exhaust’s slip-on design simplifies installation and removal, making maintenance straightforward and quick.

This exhaust system is crafted for riders seeking increased horsepower, enhanced sound, and improved throttle response. Its modular components allow customization to optimize performance across different terrains and riding styles. While not legal for street use in California on pollution-controlled vehicles, it is suitable for off-road racing and recreational riding, with a waiver available for race applications. The FMF PCIV-2 is a reliable upgrade for Yamaha YFZ450 owners looking to maximize their ATV or UTV’s performance and sound quality.

Features:

• U.S. Forestry approved spark arrestor for off-road use


• Reverse cone megaphone design offers open or disc-modified riding options


• Modular end cap system for easy tuning and performance customization


• Includes standard Hi-Flo 2-inch end cap and optional 1-3/4 inch end cap for smoother power


• Lightweight slip-on muffler enhances horsepower and sound quality