Tan Exhaust has more advantages than their competitors. One of these is experience and the other thing is ***** Also the Company has a labrotory for their customers who wants to build a prototype muffler systems for buses, trucks, tracktors, and generators.We are very proud to be able to offer our customers to build their own designs. Most important thing offer our company is to have a product Quality plan and this benefits both our customers and us in supply demand and cost benefit. Company is certified with ts en iso 9001:2000