We has set up our factory in this area for over 10 years and manufactures the tuning exhaust systems for quality of our products are very outstanding .And the price is quite reasonable. Jiajun Company is also the first factory to make this kind of products in China. We have advanced technique to increase the horsepower of cars by changing the manifolds and exhaust systems and we are well known for our sales and marketing service. We have over 500 different types of manifolds and exhaust systems which can be made of Titanium or stainless steel and fit the domestic and imported cars.