For more than 50 years, CS Cosmos STIHL has been the OEM manufacturing partner that leading equipment brands trust for precision mufflers, exhaust systems, and stamped metal components. Founded in 1972 in South Chicago Heights, Illinois, we specialize in engineering and manufacturing high-quality parts for small and medium-sized engines — built to the tolerances and production volumes that OEM programs demand.
We work with the manufacturers behind the equipment that people depend on every day: handheld power tools, lawn mowers, zero-turn and ride-on equipment, yard tractors, stationary power units, and battery-powered outdoor equipment. When quality, repeatability, and long-term supply reliability matter, CS Cosmos STIHL delivers.
What We Manufacture
Mufflers & Exhaust Systems
Our core expertise. We design and manufacture OEM mufflers and complete exhaust system assemblies for small engine applications — from prototype through full-scale production. Every component is engineered for durability, emissions performance, and seamless integration with your equipment platform.
Metal Stamping & Deep Drawing
We manufacture complex stamped and deep-drawn metal components for OEM assembly programs. Our capabilities span progressive stamping, deep draw forming, and finished assemblies — engineered for tight tolerances and high-volume consistency.
Industries We Serve
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Handheld Power Equipment
Chainsaws, trimmers, blowers, and other handheld tools
Battery-Powered Equipment
Next-generation outdoor power systems
Lawn Mowers & Yard Tractors
Walk-behind, riding, and commercial turf equipment
Stationary Power Units
Generators, pumps, and fixed-installation engines
Zero-Turn & Ride On Equipment
High-output mowing platforms and utility vehicles
Concrete Cutting Chains
Diamond chains for concrete, masonry, and demolition cutting applications
Choosing a manufacturing partner is a long-term decision. CS Cosmos STIHL has been that partner to some of the most recognized names in the outdoor power equipment industry for over five decades. We bring engineering depth, process discipline, and a track record of on-time, on-spec delivery to every program we take on.
Our customers come to us because they need more than parts. They need a supplier that understands their equipment, their quality requirements, and their production schedules — and delivers consistently across all three.