1. Upgrade Auto Parts KitYou will get a 250cm(about 98.4 inch) long car generator exhaust hose and upgraded 24mm(about 0.9 inch) muffler. There are also two stainless steel clips and screws that allow the parking heater exhaust to be better fixed to ensure a perfect seal. 2. Better Noise ReductionThis muffler adopts porous design and Sshaped pipe design. The porous design reduces airflow pressure, and the Sshaped tube increases the acoustic resistance point and sound wave propagation resistance to achieve the greatest noise reduction effect! Compared with the old muffler, the noise reduction ability is 20% higher. 3. The fuel tank exhaust pipe parking heater is made of high quality stainless steel and the generator muffler is made of aluminum alloy. It has the advantages of long life, and , heat resistance, corrosion resistance, wear resistance and durability. Fully sealed, you don't have to worry about leaks. 4. Easy to InstallThe generator exhaust hose is stretchable and bendable. The muffler can be ly extended during operation and shutdown without stressing the exhaust pipe. Simply remove the old or damaged original exhaust pipe, connect the stainless steel exhaust pipe and muffler to the car, and fasten the ends of the exhaust pipe with snaps and screws.