Mufflers
1. They are typically installed along the exhaust pipe as part of the exhaust system of an internal combustion engine. The muffler reduces exhaust noise by absorption_the exhaust is routed through a series of passages and chambers lined with roving fiberglass wool_and/or resonating chambers tuned to cause destructive interference wherein opposite sound waves cancel each other out, and Catalytic converters also have a muffling effect.
2. We are the manufacturer specilizing in this line for nearly 20 years, can produce according to your drawings.