6.7 Cummins Intake Horn

Why Does Your 6.7 Cummins Need an Intake Horn?

The Factory Elbow Was Cast to a Price, Not a Flow Bench

The stock intake horn is a narrow cast elbow with sharp internal transitions, and it sits directly in the only path charge air has into the engine. Casting draft, abrupt radius changes, and a undersized cross-section all tax the flow, which means the turbo works harder to push the same air and the intake ports receive it unevenly. It is the first bottleneck in the 6.7 intake tract.

Restriction Reads as Heat, Lag, and Uneven Cylinders

Air that fights its way through the horn arrives later and hotter. Spool lags, EGTs climb on sustained grades, and the rear cylinders draw a weaker charge than the fronts, which is exactly where the heat problems concentrate on a working 6.7. Every tuned or deleted truck amplifies the effect, because more boost through the same restriction multiplies the loss.

The Horn Comes Off During Other Work Anyway

Practical reality: the intake horn is in the way of EGR service, grid heater work, and valve cover jobs on this engine. Shops replace it during that service because the labor is already paid, and owners doing EGR deletes on the 2010-2014 trucks can bundle the horn and the delete hardware in one kit, which is exactly what our combo version exists for.

What Can a High Flow Intake Horn Solve?

A 3.5-Inch Straight Path to the Intake Ports

The high flow horn replaces the cast elbow with 3.5-inch mandrel-bent tubing, CNC-machined 6061-T6 billet aluminum flanges, and precision TIG welds, holding full diameter through every turn. Independent flow bench testing has shown roughly 49 percent more airflow compared to the stock piece, and the smooth radius feeds all six cylinders a more even charge.

Quicker Spool, Sharper Response, Lower EGTs

Owners consistently report faster turbo spool, sharper throttle response off idle, and EGT drops under load, with the clearest gains on trucks running tuning or towing heavy. The horn is a no-tune bolt-on on its own, and it becomes the intake-side foundation under every bigger build.

The Combo Option: Horn Plus EGR Cooler Delete

For the 2010-2014 generation, the 3.5-inch horn is available bundled with the EGR cooler delete kit, sealing the recirculation circuit with billet hardware while the intake is already apart. One service, both jobs, no second teardown, for trucks whose configuration and use allow the EGR removal.

Shop 6.7 Cummins Intake Horn by Dodge Ram Engine & Fitment Guide

• 3.5" High Flow Intake Manifold Elbow Tube Horn (2007.5-2018) - Fits the 6.7L Cummins in Dodge Ram 2500/3500 (2007.5-2018). Broad-coverage high flow horn for the whole fourth-gen era, from the 2008 launch-year trucks through the 2012 and into the 2013-2018 Rams.
• 3.5" Intake Horn + EGR Cooler Delete Kit (2010-2014) - Fits the 6.7L Cummins in Dodge Ram 2500/3500 (2010-2014). The combo package pairing the high flow horn with EGR cooler delete hardware for early fourth-gen trucks going further; requires delete-capable tuning and off-road use.

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 in 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.

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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.

Related 6.7 Cummins Collections

Finish the rest of the 6.7 Cummins build with the supporting hardware:

• tuner harness plug kit 6.7 cummins - Harness and plug kits that complete tuner and delete installs on 6.7 Cummins Ram trucks.

FAQs About 6.7 Cummins Intake Horn

What does the intake horn do on a 6.7 Cummins?

The intake horn, also called the intake elbow, is the casting that connects the intercooler tube to the intake manifold, delivering charge air to the intake ports. On the 6.7 it sits right above the grid heater, in the highest-velocity corner of the intake tract, which is why its shape matters so much.

The factory piece is a narrow cast elbow with sharp transitions. A 3.5-inch high flow horn opens the cross-section and smooths the radius, so the same boost arrives sooner, cooler, and spread more evenly across all six cylinders.

What are the gains from a high flow intake horn?

Independent flow bench testing has shown roughly 49 percent more airflow through proper 3.5-inch high flow designs versus the stock elbow. Translated to the driver's seat: faster turbo spool, sharper throttle response, and lower EGTs under load, especially sustained towing grades.

Honest framing on dyno numbers: the horn alone is not a huge peak horsepower adder, because the engine only breathes as hard as its tuning and fueling demand. The gains are in response, temperature, and even cylinder distribution, and they compound on tuned or deleted trucks pushing more air through the same path.

Is a 6.7 intake horn worth it?

For most owners, yes, with context. On a stock truck the difference is real but modest, mostly response and EGT headroom. On a tuned truck, a deleted truck, or a tow rig working heavy loads, the horn earns its place quickly because every additional pound of boost passes through the restriction.

It is also one of the few intake-side upgrades that needs no tuning and installs with basic hand tools, and the labor overlaps with EGR and grid heater service you may already be doing. That combination of low cost, easy install, and stacking benefit is what makes it a default first mod on the platform.

Which intake horn fits my truck year?

The 3.5-inch high flow horn covers the full fourth-gen run, 2007.5 through 2018 Ram 2500 and 3500, which includes the 2008 launch-era trucks, the 2012s, and everything after through the end of the platform. The horn-plus-EGR-delete combo fits the 2010-2014 generation.

Match the part to what you are doing: the standalone horn for airflow alone on any year, the combo for a 2010-2014 truck that is also removing the EGR cooler. Our support team confirms fitment from a VIN in minutes if your build date straddles the generations.

Does the intake horn work with the grid heater?

On the 6.7 the grid heater mounts between the horn and the intake manifold, warming intake air for cold starts. The horn itself does not replace the heater; the heater and its circuit stay in place with the horn feeding air to them, so cold-weather function is retained.

Owners looking to address the heater as a restriction have separate options in our 6.7 Cummins intake collection, including grid heater upgrade kits that open the cross-section while keeping the cold-start function. The horn and heater work can be done together in one service since both live at the same corner of the engine.

What is the difference between an intake horn and an intake manifold?

The horn, or elbow, is the piece between the intercooler tube and the manifold. The manifold is the plenum bolted to the cylinder head that distributes air to the intake ports. On the 6.7 the grid heater sits between the two, and all three pieces form the charge path's final stretch.

Our 3.5-inch high flow horn replaces the first and most restrictive of those pieces. It is the common first upgrade because it delivers most of the airflow benefit at the lowest cost and effort, without pulling the manifold itself.

Do I need an EGR delete with the intake horn?

No, the horn is a complete standalone upgrade that works on stock emissions hardware. Plenty of owners run the high flow horn on otherwise stock trucks purely for the airflow, response, and EGT benefits, with no tuning and no other changes.

The combo kit exists for the opposite case: 2010-2014 trucks already planning the EGR cooler delete get both pieces in one package because the horn comes off during that service anyway. If you are not deleting, buy the standalone horn and enjoy the bolt-on benefits.

Will a 6.7 intake horn fit a 5.9 Cummins?

No. The 6.7 horn matches the 6.7's port geometry and bolt pattern, and the 5.9L 12-valve and 24-valve engines have different intake layouts, so the pieces do not interchange. The swap question comes up often because both engines respond well to opening the intake elbow.

The good news is we carry high flow intake elbows and tubes dedicated to the 5.9, in both the 1998-2002 24-valve and 2003-2007 common rail generations, in our 5.9 Cummins performance parts collection. Same philosophy, correct bolt pattern for your engine.

Do I need a tune after installing an intake horn?

No. The horn is pure bolt-on hardware that the factory calibration handles without complaint, no codes, no adjustments. Install it, torque the connections, check for boost leaks at the couplers, and drive.

Tuning enters the picture only as an amplifier. A tuned truck makes more boost and pushes more air through the intake path, which is exactly when the high flow horn pays its largest dividend, but the order of operations is yours to choose.

Are intake horns street legal, and what is the warranty?

The high flow intake horn is an emissions-neutral airflow part, legal everywhere with no off-road restriction. The combo kit is the exception in this collection: bundling the EGR cooler delete moves it into competition and closed-course off-road use only territory, because removing emissions hardware from a registered highway vehicle violates the Clean Air Act.

Fitment spans the 2007.5-2018 Ram 2500 and 3500 platform for the horn and 2010-2014 for the combo, so confirm your generation or contact our 24/7 support and we will match it. Every order ships free from our US warehouses, carries a 1-year warranty, and is backed by a 45-day return policy if the fitment is not right.