Why Change Your Exhaust?
Vehicle performance is a combination of many different factors. There are numerous systems that must work in tandem in order for real performance to be achieved. While adding engine enhancements can be a great way to add additional horsepower, there are other areas that must be addressed, as well. In fact, something as simple as adding a custom exhaust can give you horsepower gains all by itself. Why do you need to change out your exhaust system? Let's take a look at the system.
Muffler Only – Many tuners find that a full exhaust system is very expensive, not to mention the fact that it needs professional installation. Adding an aftermarket muffler is a viable alternative to those feeling the budget crunch. The most common style of aftermarket muffler is called a "coffee can." If you look at one, you'll understand why. These mufflers are much larger than OEM mufflers and provide more than just a cool sound under acceleration. A larger muffler allows more exhaust gas to escape at one time, providing performance benefits.
Cat Back Systems – A cat back system refers to a partial exhaust system. This includes a pipe running from the catalytic converter back to the muffler (they usually include a muffler, but not always). This is more expensive than only purchasing a muffler, but is more affordable than purchasing an entire system.
Full System – The denotation that this is a full system is somewhat misleading. You'll still need to purchase headers separately. This system runs from the exhaust manifold all the way back and includes a replacement catalytic converter (rarely) or makes use of the existing catalytic converter (usually). The pipes in this type of system are considerably larger in diameter than OEM pipes, allowing much greater exhaust flow out of the engine. This means the engine does not have to work as hard to move the exhaust gasses, and provides additional power for the engine to supply to the transmission.
Headers – Headers are an important part of any exhaust installation. Removing your old OEM exhaust manifold and replacing it with a header or a set of headers will not only allow the exhaust to exist faster, it will lighten the load that the engine must carry in terms of sheer weight. In addition, headers are an important part of attaining that coveted sound that only comes from a true custom exhaust.
How does the intake work? Generally, a cold air intake rests behind the passenger headlight, midway down the engine block. This provides the engine with cold, dense air from outside the engine compartment. Why does the engine need cold, dense air? Hot air expands inside the engine, providing less oxygen for the fuel to mix with; however, cold air is dense, providing more oxygen at a faster rate. This equals more combustion, more fuel burnt per stroke and greater power output from the engine. In short, it adds horsepower. There are other types of intakes available, but a cold air intake is the best option for most tuners, as well as being one of the most affordable ways to increase engine performance.
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