The 2006 Arctic Cat T660 Turbo ST is a 4-stroke turbocharged snowmobile engineered for performance and reliability. Designed for enthusiasts seeking a robust and capable machine, this model combines advanced technology with Arctic Cat's commitment to quality. Its 4-stroke turbocharged engine delivers consistent power, making it suitable for a variety of snow conditions and riding styles. This snowmobile represents a significant offering in its class, built to provide an exceptional riding experience. This comprehensive workshop service repair manual provides in-depth coverage for the Arctic Cat T660 Turbo ST snowmobile. It is designed for both do-it-yourself enthusiasts and experienced mechanics, offering a cost-effective solution for maintaining vehicle performance. The manual includes hundreds of pages with step-by-step instructions, detailed illustrations, and factory-level specifications covering all major systems, including the engine, fuel system, electrical system, drivetrain, suspension, steering, and brakes. It also details essential maintenance procedures, troubleshooting guides, and repair instructions, ensuring owners can effectively service and maintain their snowmobile.