The essence of the exhaust system can no longer be emphasized. It is a highly integrated exhaust system of ducts, devices and processes that converts the terrible by-products of combustion into a lesser form of evil and also eliminates noise that can be very annoying to many people and annoy you as a driver.
Whichever exhaust system you choose, single or dual system, proper implementation will yield fantastic results for your car. If you are thinking about upgrading your exhaust, you should ask yourself what your sound preferences are, as well as your appearance and budget. You can also buy high-performance exhaust systems via http://xforce.eu/.
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Horsepower relies heavily on exhaust flow, and it really doesn't matter whether it's a single exhaust system or a dual exhaust system. Some people prefer double trumpets for their car sound. The twin tubes separate the gas stream and make the sound more audible. This is preferred for more analog exhausts.
Most people who like to replace their exhaust system don't opt for a true dual muffler. A complete overhaul meant replacing the system from the manifold to the exhaust pipe. The dual exhaust system is the preferred system for speed and torque as it uses 2 smaller pipes that can increase speed and horsepower.
Since turbocharged diesel engines have large exhaust lines, a single exhaust system can work perfectly for this type of engine.