4 Inch Diameter

Exhaust pipes 4" in diameter are one of the most common factory-built sizes for semi-trucks, and many drivers prefer to stick with this measurement for replacements and upgrades. A 4-inch exhaust provides the right amount of air flow and back pressure to keep your truck running well at every engine speed. 

If you're looking to replace your OEM 4-inch exhaust pipes, choose quality aftermarket components from Truck Pipes USA. We only stock the best aftermarket brands, including Grand Rock, DINEX, Riker Products, and more. These parts are designed and manufactured to perform at least as well as OEM parts under similar conditions, so why spend more than you need for the same performance?

Exhaust Pipe Size Matters

An increase in exhaust pipe size means more air reaching the engine to mix with diesel fuel. Up to a point, more air means more complete combustion and better fuel efficiency. Pipes that are too big, however, can generate insufficient back pressure, leading to inconsistent performance at slower engine speeds.

Many semi-truck drivers find that a 4-inch exhaust pipe is the perfect size for their needs. Plus, you can upgrade your 4-inch parts with the wide selection of components available at Truck Pipes USA. 

If you need help choosing a specific piece, our friendly team is just a phone call away. We're ready to help you find what you're looking for in any pipe size.

4-Inch Exhaust Pipes

We stock multiple options for all parts in a 4-inch exhaust system, including:

• Mufflers
• Rain caps
• Intake hoses
• Pipes
• Clamps
• Heat shields

For over a decade, we've offered drivers great value on each and every part we sell. And with free shipping on all orders over $99, we make it affordable to keep your exhaust system in top condition.

Browse our selection and place an order on our easy-to-use website. We aim to ship all in-stock components within one to two business days after purchase. If a truck is down and an order can't wait, we offer rush handling for a $25 fee, and several express shipping options are available.

Top Brands for Major Truck Makes

We have parts for the most popular truck makes, including:

• Freightliner
• Western Star
• Volvo
• Kenworth
• Peterbilt

At Truck Pipes USA, craftsmanship is as important to us as it is to our customers. That's why all of our parts are high-quality and manufactured in North America from top aftermarket brands such as Grand Rock. Many of our parts are under warranty, and our customer service team is happy to help you start the process should you need assistance. We also offer custom pipes for less common rigs. 

Why Shop at Truck Pipes USA?

Life on the road isn't easy, but at Truck Parts USA, we aim to make it as smooth as possible. Drivers, owners, and fleet managers can find exactly what they need in our large selection, and our shopping policies and great prices put you first. 

Shop our selection of 4-inch exhaust pipes and equipment and get what your rig needs.