Audi 4000S Exhaust are designed for this Audi 4000 that is the equivalent to European version called the Audi 80. These audi 4000S Exhaust are essential to upgrade this sensation of a vehicle that was produced for around 40 years (from 1966-1996). Initially the Audi 80 was essentially the Volkswagen Passat and it eventually diverged from its Volkswagen counterpart in the mid 1970s. In the United States the Audi 80 was initially called the FOX for a brief stint and then it took on the 4000 name in 1980. The vehicle was designed by Italian designer Giorgetto Giugiaro. This vehicle proved to be quite profitable because it borrowed parts from many of its counterparts at audi and did not require intire part redesigns. View our inventory of Audi 4000S Exhaust. These Audi 4000S Exhaust were designed to suit even the pickiest Audi enthusiast. The 4000S Exhaust of your car is a complex system that consists of a header, catalytic converter, pipes, and muffler. This system is designed to eliminate waste gas from within the engine of your car. The faster and more efficiently this gas is allowed to escape the better overall the 4000S Exhaust system works. The most important part of the 4000S Exhaust system to most is the muffler. The muffler is the final piece the 4000S Exhaust gas travels through before it exits into the environment. The 4000S Exhaust system should be able to eliminate the waste gas while also maintaining proper 4000S Exhaust back pressure so that the engine doesn't have to do much more work to operate. Common 4000S Exhaust manufactures include: 5Zigen, APEX Borla, FlowMaster, GReddy, HKS, JIC Magic, MagnaFlow, Tenzo Racing, and many others. These parts can include any pieces of the 4000S Exhaust system from the header on down to the mufflers.