The Straightline Performance Arctic Cat 400 Series Lightweight Ceramic-Coated Performance Muffler delivers an 8-pound weight savings, premium ceramic-coated construction, and a clean, trail-legal performance exhaust note that's noticeably more aggressive than stock. Designed for a direct bolt-on installation, this lightweight muffler improves handling, reduces under-hood temperatures, and provides outstanding fit, finish, and long-lasting durability for Arctic Cat 400 Series snowmobiles.