Manifolds

Your exhaust manifold is a simple yet critical engine part that collects gases from individual cylinders and sends them to your catalytic converter and the muffler. It is the first step in cleaning toxic engine gases and reducing your emissions. It also helps you maintain fuel efficiency. 

How Does an Exhaust Manifold Work? 

Each cylinder in your engine burns gas and sends it to the exhaust manifold. Most trucks have a single exhaust manifold, but some V-type engines have two. This part will burn any unused gas and funnel all the exhaust to the catalytic converter for cleaning. Your manifold also includes oxygen sensors, heat shields, and gaskets to adjust the air-to-fuel ratio. 

Engine exhaust is hot, so your manifold needs to resist both heat and corrosion. Manifolds are usually made of cast iron, stainless steel, or aluminum. For example, Caterpillar exhaust manifolds are typically made of cast iron or specialized cast steel, while Navistar exhaust manifolds are often made of high-silicon ductile iron. 

Why Should I Use an Aftermarket Exhaust Manifold? 

Your original equipment manufacturer (OEM) specifications will recommend a brand-specific manifold, such as a Cummins exhaust manifold or a Mack exhaust manifold. An aftermarket manifold can help you customize your engine to perform better. 

You can choose an exhaust manifold made of different materials or offering various features that improve fuel efficiency and optimize gas flow in your engine. Before you buy an aftermarket part, check with Truck Parts USA to make sure it will work in your engine. 

How Do I Know If I Need a New Exhaust Manifold? 

Hearing loud or unusual engine noises is often your first clue. When your exhaust manifold fails, your engine starts ticking, tapping, clicking, or puffing, particularly if it was cold before you started the engine. 

Lower gas mileage is another sign that something is amiss in your exhaust manifold. When it malfunctions, your engine burns more fuel, and you find yourself at the pump more often. If you’re filling up more often, check your exhaust manifold for cracks or other damage. 

When exhaust starts building up in your engine, it gets hot. If you notice your engine overheating more frequently, check the exhaust manifold.

How Do I Choose the Right Exhaust Manifold? 

Look for an exhaust manifold that matches your truck’s make, such as a Detroit Diesel exhaust manifold or a Paccar exhaust manifold. Truck Parts USA carries an extensive selection of exhaust manifolds for different brands. 

You can choose different exhaust manifolds to improve fuel efficiency or reduce noise. Look for models with a port layout, bolt pattern, and flange that fit your engine. Next, choose the material. Some exhaust manifolds will resist heat and corrosion better, meaning you can replace them less often. If you’re not sure, research multiple brands and note different return and warranty options so you can change your mind if you’re not satisfied. 

Truck Pipes USA offers multiple high-quality, trusted brands with parts made in the USA. Once you’ve chosen an exhaust manifold, we will ship it to you quickly to get you back on the road. Reach out to our customer service team with questions.