Automotive Journal

Most trucks are quite powerful - that’s probably why you own one. Trucks are made to haul and tow thousands of pounds without difficulty, so they need lots of power. Yet despite their powerful engines, most manufacturers equip their new vehicles with a relatively quiet exhaust system. If you think your truck ought to sound as powerful as it is, or if you’d like to reduce some of the constrictions in your truck’s exhaust, then you’re probably considering adding to or changing your factory exhaust system.

The factory exhaust system already on your truck is already a pretty efficient system and doesn`t really need much modifications to be improved. The first part of your truck’s exhaust system is the exhaust manifold, which channels exhaust from individual cylinders into larger main pipes. These systems are efficient and don’t need to be changed, but if you decide you want to anyways, you’ll need a set of headers. Quality headers like the ones you’ll want will have a ceramic coating and factory mounting points for the sensors. Most of the time though, the standard manifold is more than good enough.

The next components which the exhaust gases travel through are the catalytic converters. There’s really no benefit to changing or modifying these, and taking them off is a bad idea. Today’s modern catalytic converter is very efficient and legally required, so it makes sense to leave it alone. You would only consider replacing the factory catalytic if you were adding an extremely powerful engine upgrade, like a turbocharger or supercharger.

After the catalytic converters, the exhaust gases cool somewhat and enter the muffler. Again, the factory exhaust system is pretty good and the standard mufflers aren’t very restrictive. Replacing them usually won’t result in a significant hp or torque gain…3-5 hp and 5-10 ft-lbs of torque on average. However, after market mufflers will make your truck sound much better. The rumble you’ll hear with after market mufflers is exciting, and well worth the cost. After leaving the mufflers, the exhaust will exit out of the tailpipe. Tailpipe tips are a popular add-on, but they’re decorative only, and have no impact on your exhaust system’s performance.

Since changing the factory muffler will have the biggest effect on your exhaust system, they’re the most logical component to replace. When you’re looking at after market mufflers, here are some things to consider:

First, ask yourself if you really want to be hearing the exhaust ALL the time. If you do, make sure to take that into account when selecting your muffler. If you’d prefer not to hear the muffler in the background as you’re driving down the highway, choose a muffler that’s not described as loud. You can look online or at your local muffler shop for more help on finding the perfect muffler. There are even sound clips on many muffler manufacturers’ websites now so you can hear what your muffler will sound like before you buy.

Second, do you want your muffler to be just loud enough for passersby to hear, or do you want a loud that will make people stop and stare? If you’re looking for that extra attention, you’ll want a muffler with words like “racing” or “glasspack” in the description. Otherwise, these mufflers may be too loud for your tastes.

Another important choice when considering a new muffler is single or dual exhaust. Remember, most factory exhaust systems are pretty good. If your truck came from the factory with a single exhaust, it will work just fine and give good performance with a single after market exhaust system. Dual exhaust systems cost more money, but they look and sound better than single exhaust systems. If you decide to go with a dual exhaust, make sure that your installer works around your trailer hitch and/or leaves room for one in case you want to add it on later.

Finally, what exhaust system material is best? It’s a decision that should be based on geography. If you live anywhere near the corrosive effects of saltwater, stainless steel is the smart choice. While it’s more expensive up-front, it will last much longer than galvanized or aluminized steel in these climates. People living in dry climates really don’t need to purchase stainless steel - if rust attacks their system, it will be years before anything is damaged.