Audi 90 Exhaust can be used on this wonderfully designed germen vehicle. This vehicle is essentially an up market version of the Audi 80 and had different performance and styling characteristics compared to the 80. Both these vehicles were offered throughout the 1980's and 1990 Exhaust's. Audi 90 Exhaust also fit Audi 80 vehicles and may fit Audi 100 vehicles or even more models. View our inventory of Audi 90 Exhaust. These can dramatically improve this Audi vehicle. The 90 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 90 Exhaust system works. The most important part of the 90 Exhaust system to most is the muffler. The muffler is the final piece the 90 Exhaust gas travels through before it exits into the environment. The 90 Exhaust system should be able to eliminate the waste gas while also maintaining proper 90 Exhaust back pressure so that the engine doesn't have to do much more work to operate. Common 90 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 90 Exhaust system from the header on down to the mufflers.