SPEEDWERX L2 Comp Series Muffler AC858M-2

The SPEEDWERX L2 Comp Series Muffler AC858M-2 is designed to be lighter and louder than the original lightweight muffler while maintaining performance at or above the stock system. It is made from mild steel and ceramic coated for a durable finish.

This muffler is designed to use the stock outlet location and requires no major chassis modifications for installation. Ceramic coating is included, and most SPEEDWERX mufflers come with installation instructions if needed.

The SPEEDWERX AC858M-2 fits select 2024 Arctic Cat M 858 Alpha One and 2025 Arctic Cat ZR 858 models, including listed 146-inch, 154-inch, 165-inch, 129-inch and 137-inch configurations. It is made in the USA.

Features:

• Weight Savings: Designed to provide an 8–15 pound weight savings.
• Louder Design: Designed to be lighter and louder than the original lightweight muffler.
• Performance Focus: SPEEDWERX mufflers are designed to perform the same as or better than the stock system.
• Construction: Made from mild steel.
• Ceramic Coating: Ceramic coated for a durable finish.
• Installation Design: Utilizes the stock outlet location and requires no major chassis modifications for installation.
• Fitment: Fits listed 2024 Arctic Cat M 858 Alpha One and 2025 Arctic Cat ZR 858 models.
• Origin: Made in the USA.

Fitment:
Arctic Cat M 858 Alpha One 154" 2024
Arctic Cat M 858 Alpha One 154"/3.0" 2025
Arctic Cat M 858 Alpha One Sno Pro 146"/2.6" 2024
Arctic Cat M 858 Alpha One Sno Pro 146"/3" 2024
Arctic Cat M 858 Alpha One Sno Pro 154"/2.6" 2024
Arctic Cat M 858 Alpha One Sno Pro 154"/3" 2024
Arctic Cat M 858 Alpha One Sno Pro 154"/3.0" 2025
Arctic Cat M 858 Alpha One Sno Pro 165"/2.6" 2024
Arctic Cat M 858 Alpha One Sno Pro 165"/3" 2024
Arctic Cat M 858 Mountain Cat 146"/2.6" 2025
Arctic Cat M 858 Mountain Cat 154"/2.6" 2025
Arctic Cat M 858 Mountain Cat 154"/3.0" 2025
Arctic Cat M 858 Mountain Cat 165"/3.0" 2025
Arctic Cat M 858 Mountain Cat ES 146"/2.6" 2025
Arctic Cat M 858 Mountain Cat ES 154"/2.6" 2025
Arctic Cat M 858 Mountain Cat ES 154"/3.0" 2025
Arctic Cat M 858 Mountain Cat ES 165"/3.0" 2025
Arctic Cat M 858 Mountain Cat w/ Atac 146"/2.6" 2025
Arctic Cat M 858 Mountain Cat w/ Atac 154"/2.6" 2025
Arctic Cat M 858 Mountain Cat w/ Atac 154"/3.0" 2025
Arctic Cat M 858 Mountain Cat w/ Atac 165"/3.0" 2025
Arctic Cat M 858 Mountain Cat w/ Atac ES 146"/2.6" 2025
Arctic Cat M 858 Mountain Cat w/ Atac ES 154"/2.6" 2025
Arctic Cat M 858 Mountain Cat w/ Atac ES 154"/3.0" 2025
Arctic Cat M 858 Mountain Cat w/ Atac ES 165"/3.0" 2025
Arctic Cat M 858 Sno Pro 146"/2.6" 2025
Arctic Cat M 858 Sno Pro 154"/2.6" 2025
Arctic Cat M 858 Sno Pro 165"/3.0" 2025
Arctic Cat M 858 Sno Pro ES 146"/2.6" 2025
Arctic Cat M 858 Sno Pro ES 154"/2.6" 2025
Arctic Cat M 858 Sno Pro ES 154"/3.0" 2025
Arctic Cat M 858 Sno Pro ES 165"/3.0" 2025
Arctic Cat Riot 858 Sno Pro ES 146"/1.35" 2025
Arctic Cat Riot 858 Sno Pro ES 146"/1.75" 2025
Arctic Cat Riot 858 w/ Atac 146"/1.35" 2025
Arctic Cat Riot 858 w/ Atac 146"/1.75" 2025
Arctic Cat ZR 858 137" ES 2025
Arctic Cat ZR 858 R-XC 137" 2025
Arctic Cat ZR 858 Sno Pro 137" ES 2025
Arctic Cat ZR 858 Sno Pro ES 129" 2025
Arctic Cat ZR 858 W/ Atac 129" ES 2025
Arctic Cat ZR 858 W/ Atac 137" ES 2025