2025-2026 Arctic Cat 858 Catalyst Quiet Muffler

Fits:

• 2025 M858 Alpha One/M858 Mountain Cat /ZR 858/Riot 858

Stock Muffler: 18.30 lbs 
GGB Mountain: 7.75 lbs 
Weight Savings: 10.55 lbs

Quiet Muffler

Enhanced sound

The GGB Quiet muffler is designed for riders wanting to enhance the stock sound and save weight at the same time. At idle the Quiet muffler delivers a deeper slightly louder exhaust note, transitioning to close to stock sound levels through the mid range and top end to keep the peace. Dyno tested to provide as good as or better than stock performance.

GGB Advantage:

• Performance Guarantee
• Increased throttle response
• Aggressive exhaust note
• Huge weight savings
• No fuel mods
• Simple install
• Secure fit

Fuel and clutching mods are not necessary prior to installation. GGB two stroke mufflers are flow benched developed for back pressure against the stock muffler and will perform efficiently in any application where the stock muffler would be used.