Powerstroke, Cummins & Duramax Intercooler Pipe

Why Does Your Diesel Engine Need an Intercooler Pipe Kit?

Factory Pipes Crack and Collapse Under Boost

The stock intercooler pipes on most Powerstroke, Cummins, and Duramax trucks are thin-wall steel or plastic that cannot handle sustained high boost pressures. Once you tune your truck or upgrade the turbo, the factory hot side intercooler pipe and cold side intercooler pipe become weak links that can split, crack, or collapse entirely, causing instant boost loss and leaving you stranded.

Stock Rubber Boots Blow Off at Higher PSI

Factory CAC boots are made from standard rubber that hardens and degrades from years of heat cycling and oil exposure. At stock boost levels they hold up, but when you increase turbo pressure, these boots swell, tear, and eventually blow off the intercooler pipe connections. A blown intercooler boot means zero boost, a loud hissing noise, and potentially dangerous under-hood conditions on your Powerstroke or Cummins.

Restricted Factory Piping Limits Airflow and Power

Many factory intercooler pipes are crush-bent rather than mandrel bent, which pinches the internal diameter at every bend and restricts airflow from the turbo to the engine. On the 5.9 Cummins, 6.7 Cummins, and 6.6 Duramax, the factory routing includes sharp bends that create turbulence and pressure drop. This restriction raises exhaust gas temperatures, slows turbo spool, and caps the horsepower your engine can produce regardless of how much fuel you add.

What Can an Intercooler Pipe Kit Solve?

Mandrel Bent Pipes Maximize Charge-Air Flow

A mandrel bent intercooler pipe maintains a constant internal diameter through every bend, eliminating the restriction found in factory crush-bent piping. Whether you choose a 3 inch intercooler pipe for a 7.3 Powerstroke or a 4 inch intercooler pipe for a 6.7 Cummins, the smooth bends reduce turbulence and pressure drop between the turbo and intake manifold. The result is lower EGTs, faster turbo response, and more consistent boost delivery across the entire RPM range.

Reinforced Silicone Boots Seal Under High Boost

Upgraded intercooler boot kits use multi-ply reinforced silicone that resists heat, oil, and pressure far better than factory rubber. These silicone CAC boots grip the intercooler pipe connections tightly and will not blow off under high boost, even on tuned 6.4 Powerstroke or 6.7 Powerstroke engines running 40+ PSI. Combined with heavy-duty T-bolt clamps, an intercooler boot kit eliminates the most common point of boost leakage in the charge-air system.

Direct-Fit Design Means No Cutting or Welding

Every intercooler pipe kit in this collection is engineered as a direct bolt-on replacement for the factory piping on your specific engine and year range. The pipes and boots match the factory connection points, diameters, and routing paths, so you do not need to cut, weld, or fabricate anything. From the 7.3 Powerstroke intercooler pipe to the 6.6 Duramax hot side intercooler pipe, each kit installs using basic hand tools in your driveway.

Shop Intercooler Pipe Kit by Engine & Fitment Guide

• 7.3L Powerstroke (1999-2003): CAC Boot Kit, 3-Inch Intercooler Pipe Boot Kit (Hot & Cold Side), Turbo Intercooler Pipe Kit (shared with 6.0L)
• 6.0L Powerstroke (2003-2007): Turbo Intercooler Pipe Kit
• 6.4L Powerstroke (2008-2010): Cold Side Intercooler Turbo Pipe Kit, Full Intercooler Turbo Pipe Kit, High Flow Hot Side Boot Kit
• 6.7L Powerstroke (2011-2016): Cold Side Intercooler Pipe
• 6.7L Powerstroke (2017-2019): Turbo Intercooler Outlet Tube
• 5.9L Cummins (1994-2002): 2.75in Mandrel Bent Intercooler Pipe Kit, Black Silicone Boot Kit, Heavy Duty Silicone Boot Kit
• 5.9L Cummins (2003-2007): 3in High Flow Intake Elbow Tube, Intercooler Pipe and Boot Kit, Stainless Steel Intercooler Pipe
• 6.7L Cummins (2007.5-2012): 4in Cold Air Intake Kit
• 6.7L Cummins (2013-2018): Intercooler Pipe (Polished or Silver/Black finish)
• 6.6L Duramax LB7 (2002-2004): 3-Inch Intercooler Pipe Boot Kit
• 6.6L Duramax LLY/LBZ/LMM (2004.5-2010): Hot Side Intercooler Pipe
• 6.6L Duramax LML (2011-2016): Intercooler Pipe Boot Kit
• 3.0L Duramax LM2/LZ0 (2020-2025): Turbo Resonator Tube

Why Choose EGR Performance?

The industry standard for high-performance diesel reliability.

Premium Quality & Rigorous Testing

Our EGR, DPF, and CCV delete kits are engineered from premium-grade materials and subjected to brutal quality control and field testing. Unlike generic alternatives, our products are built to withstand extreme heat and pressure, delivering unmatched durability and long-term stability when your rig needs it most.

20 Years of Proven Diesel Expertise

We aren't just selling parts. We live this industry. With two decades of hands-on experience providing specialized modification solutions for heavy-duty truck owners, our upgrades have been extensively proven across every driving environment, from daily towing to high-performance tracks.

Industry-Leading Standards

We work hand-in-hand with top-tier industry partners and reputable organizations. Every product we design, test, and ship meets or exceeds strict industry standards, ensuring your Powerstroke, Cummins, or Duramax gets the exact precision it deserves.

Real Results, Proven Track Record

Thousands of diesel owners trust us to unlock their engine's true potential. Our massive library of positive customer feedback and successful build case studies proves one thing: our kits deliver real horsepower, lower EGTs, and flawless reliability in the real world.

Frequently Asked Questions

What are the symptoms of a bad intercooler pipe or boot on a diesel truck?

The most common symptoms of a failing intercooler pipe or boot include a loud hissing or whooshing sound from the engine bay under boost, a noticeable drop in boost pressure on your gauge, and visible oil mist around the intercooler connections.

On the 7.3 Powerstroke and 6.0 Powerstroke, a blown CAC boot often triggers a check engine light for underboost or overboost codes. On the 6.4 Powerstroke and 6.7 Powerstroke, you may notice black smoke from the exhaust and sluggish throttle response.

On Cummins and Duramax engines, a cracked intercooler pipe or leaking boot produces similar symptoms: reduced power, higher EGTs, and poor fuel economy. If you suspect a boost leak, inspect all intercooler pipe connections and silicone boots for tears, swelling, or oil residue.

What is the difference between a hot side and cold side intercooler pipe?

The hot side intercooler pipe connects the turbocharger compressor outlet to the intercooler inlet. This pipe carries hot, pressurized charge air and sees the highest temperatures in the intake system.

The cold side intercooler pipe connects the intercooler outlet to the engine intake manifold. This pipe carries cooled, dense air after it has passed through the intercooler.

On most Powerstroke, Cummins, and Duramax engines, the hot side pipe is typically shorter and located near the turbo, while the cold side pipe is longer and routes from the bottom or side of the intercooler up to the intake. Both pipes use silicone boots and clamps at each connection point.

When upgrading, some diesel owners replace both sides together as an intercooler pipe kit for consistent flow and durability, while others address only the side that is leaking or damaged.

Will an upgraded intercooler pipe kit increase horsepower on my Powerstroke or Cummins?

An upgraded intercooler pipe kit can improve horsepower on tuned diesel engines by reducing airflow restriction between the turbo and intake manifold. Mandrel-bent pipes with larger diameters, such as 3 inch, 3.5 inch, or 4 inch intercooler pipe options, flow more air than factory crimped or pressed pipes.

On a stock truck, the horsepower gain from an intercooler pipe alone is modest. The real benefit comes on tuned Powerstroke, Cummins, or Duramax engines where boost pressure is higher and the factory pipes become a bottleneck.

A high flow intercooler pipe also helps lower exhaust gas temperatures and improves turbo spool response. When paired with an intercooler boot kit and quality clamps, the entire charge-air system operates more efficiently under high boost conditions.

What size intercooler pipe do I need for my diesel truck?

The correct intercooler pipe size depends on your engine, turbo setup, and horsepower goals. Most factory 7.3 Powerstroke and 6.0 Powerstroke trucks use a 3 inch intercooler pipe on both the hot and cold sides.

The 5.9 Cummins typically uses a 2.75 inch or 3 inch intercooler pipe depending on the year, while the 6.7 Cummins often uses a 3.5 inch or 4 inch intercooler pipe. The 6.4 Powerstroke and 6.7 Powerstroke use larger diameter pipes from the factory.

For Duramax engines, the LB7 uses a 3 inch intercooler pipe, while later models like the LML use larger stock piping. If you are running a stock turbo at stock boost levels, matching the factory diameter is usually sufficient. For larger turbos or high horsepower builds, stepping up to a larger diameter intercooler pipe kit reduces restriction and supports the extra airflow.

Do I need to replace my intercooler boots when upgrading the intercooler pipe?

It is strongly recommended to replace the intercooler boots whenever you upgrade the intercooler pipe. The boots form the seal between the pipe and the intercooler or turbo connections, and old boots are the most common point of failure in the charge-air system.

Factory rubber boots harden and crack from years of heat cycling and oil exposure. Upgraded silicone intercooler boots are reinforced with multiple ply layers and withstand much higher boost pressures without blowing off.

Many intercooler pipe and boot kits include both the pipes and boots together, ensuring proper fitment and sealing. If you are buying a pipe-only kit, adding a matching intercooler boot kit with T-bolt clamps is a small investment that prevents the most common type of boost leak on Powerstroke, Cummins, and Duramax engines.

How do I know if my 7.3 Powerstroke or 6.0 Powerstroke intercooler boot is leaking?

On the 7.3 Powerstroke and 6.0 Powerstroke, a leaking CAC boot typically causes a loud hissing noise from the engine bay under acceleration, a drop in boost pressure, and often a check engine light with underboost codes. You may also notice oil mist spraying from the boot connection point.

To confirm a leaking intercooler boot, inspect each boot visually for cracks, tears, or swelling. The boots on the 7.3 Powerstroke and 6.0 Powerstroke connect the turbo outlet pipe to the intercooler and the intercooler to the intake, and both sides are prone to failure at higher mileage.

A boost leak test is the most reliable diagnostic method. Pressurize the intake system with compressed air through the turbo inlet and listen for leaks. If the pressure drops, follow the hissing sound to find the leaking boot or cracked intercooler pipe connection.

What does a mandrel bent intercooler pipe do for my Cummins or Duramax?

A mandrel bent intercooler pipe maintains a constant internal diameter through every bend, unlike factory pipes that are crush-bent and restrict airflow at the curves. This means the air charge flows smoothly from the turbo to the intercooler and into the engine without turbulence or pressure drop.

On the 5.9 Cummins, a mandrel bent intercooler pipe in 2.75 inch or 3 inch diameter replaces the restrictive factory piping and improves turbo response. On the 6.7 Cummins and 6.6 Duramax, mandrel bent pipes in larger 3.5 inch or 4 inch diameters support high boost applications and big turbo upgrades.

The result is lower EGTs, faster turbo spool, and more consistent boost delivery across the RPM range. For any truck running above stock boost levels, mandrel bent intercooler piping is one of the most effective bolt-on airflow improvements.

Can I install an intercooler pipe kit on my diesel truck myself?

Yes, most intercooler pipe kit installations can be done at home with basic hand tools. On the 7.3 Powerstroke and 6.0 Powerstroke, the intercooler pipes and boots are accessible from the engine bay and front grille area, and the job typically takes one to two hours.

On the 6.4 Powerstroke and 6.7 Powerstroke, the cold side intercooler pipe may require removing the front wheel and inner fender liner for access. On the 5.9 Cummins and 6.7 Cummins, the pipes route along the driver side of the engine bay and are relatively straightforward to reach.

For Duramax engines, the hot side intercooler pipe and cold side pipe are both accessible with the hood open. The key to a successful install is ensuring all boots are fully seated on the pipe connections and that T-bolt clamps are tightened evenly to prevent blow-off under boost.

What is the difference between an intercooler pipe kit and an intercooler boot kit?

An intercooler pipe kit includes the rigid metal pipes that carry pressurized air between the turbo, intercooler, and intake manifold. These pipes are made from aluminum, stainless steel, or aluminized steel and are available in various diameters and configurations for each engine platform.

An intercooler boot kit contains the flexible silicone couplers that seal the connections between the pipes and the intercooler, turbo, and intake. CAC boots are multi-layered reinforced silicone hoses designed to flex slightly with engine movement while maintaining a pressure-tight seal.

Some products combine both into a complete intercooler pipe and boot kit, which is the most convenient option since it ensures all components match in diameter and fitment. If your factory pipes are fine but the boots are cracking, an intercooler boot kit alone is sufficient. If the pipes are damaged or you are upgrading for higher flow, a full intercooler pipe kit is the better choice.

What is the return policy for EGR Performance intercooler pipe kits?

EGR Performance offers a 45-day hassle-free return and a one-year warranty on all intercooler pipe kits. Whether you order a cold side intercooler pipe for a 6.7 Powerstroke, a mandrel bent intercooler pipe for a 5.9 Cummins, or a hot side intercooler pipe for a 6.6 Duramax, if the part does not fit your vehicle or you encounter any quality issues, you can return it within 45 days of purchase for a full refund or exchange.