There is the measurement of the inner diameter of the hole of the exhaust pipe, commonly referred to as the ID, and measuring the outer diameter of the exhaust pipe, which is referred to as the OD. For the exhaust, there are two measurements that you will take when measuring them. There are multiple measurements and pieces that go into an exhaust stack installation, the exhaust, the spool, and the stack. ![]() How Do You Measure Semi Truck Exhaust Stacks? Overall it helps the engine perform more efficiently and powerfully. But because of the way they allow the exhaust to escape, it allows the air in the engine to be expelled faster and in larger volume allowing the engine to continue the next exchange. They do not directly add horsepower to the engine. Some studies have shown that in the right environment and with the right engine dual exhaust stacks can improve the overall horsepower of the engine. It can be much quieter because there is not as much gas being forced through a smaller area as well as helping the engine to run better by keeping it cool. With two exhaust pipes, there is more airflow allowing any fumes to be expelled faster. There are multiple reasons that two exhaust stacks are on some semi trucks. ![]() ![]() While it may seem simple enough, here is a more in depth look at how exhaust stacks function on a semi truck. They also protect drivers who pass by or drive near the truck, which allows for a better field of vision for all. Stacks also are in place to keep soot and smoke out of the eyes and lungs of the truck driver. Begin Your Search What is the Purpose of Exhaust Stacks on a Semi Truck?Įxhaust stacks are how semi trucks cool their engines and get the used hot air out of the way for the engine to continue its performance.
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