Dual Vs. Single Porsche Exhaust Systems - Which One Works Better?

There is an old adage known to mechanics and car enthusiasts – what goes in must surely come out. This is especially true when referring to Porsche exhaust systems. It gets even better when one considers the fact that with the exhaust system, you have two main choices. Either go for the dual exhaust system or the more common option which is the single one. Making up your mind can be hard if you’re buying a car for the first time or you’re simply not an enthusiast. But like you will find out, these two systems are easy to understand.

How The Exhaust System Works

Porsche engines have four strokes. There is the intake and the compression. There is the combustion and the exhaust. Air and fuel get pulled into the engine (the intake) then the piston comes up so as to compress this mixture and make it volatile (compression). The spark plug quickly fires up and causes an explosion in the cylinder (combustion). The whole process takes just minutes. Note though, that not all the air and fuel is used. There are leftovers which must be expelled so as to pave way for fresh fuel and air for yet another process. This is what experts refer to as the exhaust stroke. In simple words, it is the left over air and gas forced out of the cylinder via exhaust valves into the manifold and out through the exhaust system.

Single Vs Dual Exhausts

Single exhaust systems feature or two exhaust manifolds. It all boils down to the size of your car engine. It does not end there. If your car model has four cylinders, then your car will most likely have a single exhaust manifold. Things change when you have a V6 or larger engine. In that case, you will two exhaust manifolds. Each exhaust manifold will serve its own head or ‘bank’.

 Keep in mind that a vehicle with two manifolds as well as two exhaust tips can still have a single exhaust. Immediately after the manifold, pipes lead straight to the catalytic converter and the muffler. If your Porsche has single exhaust, the steel pipes coming out of each exhaust manifold will be joined in a ‘Y’ before connecting to the catalytic converter and the muffler. A dual exhaust system may also feature an ‘H’ pipe right before the converters. This serves two main purposes; to increase horsepower and to back pressure.

Which One Works Better?

Think about it this way. If you have dual exhaust tips fitted onto a single exhaust, your vehicle will look stunning. This won’t do anything though as far as increasing power is concerned. Dual exhaust will only give you significant power output because of your car engine’s ability to breathe better. So if you are trying to increase power, the best you can do is to go for a dual exhaust. This will force you to replace the intake manifolds with new headers, but it will be worth your time and money. From then on, you can add the appropriate piping, catalytic converters and mufflers.


You may not know it but dual exhaust systems make vehicles more fuel efficient. With a larger and more efficient exhaust system, you can significantly increase the amount of fuel and air sucked into the car engine. However, you must use the right muffler, header, pipes and tubes.