The 6.7 Cummins in Ram 2500 and 3500 trucks already produces impressive power and torque. However, some owners are always looking for more. Cummins 6.7L diesel engines respond very well to tuning and simple mods. Among those is an intake horn upgrade – also known as the intake manifold. This simple mod offers some awesome benefits for the inline-6 Cummins diesel engine. In this guide, we discuss some the best 6.7 Cummins intake horn upgrades along with benefits, EGT, cost, and more.
*This guide is for the 2007.5-2018 Ram 2500 & 3500 with the 6.7L Cummins turbodiesel engine.
6.7 Cummins Intake Horn – What Is It?
An intake horn isn’t a mod you hear much outside of the Cummins turbodiesel world. If you’re not familiar with Cummins engines you’re probably asking, “What the heck is a 6.7 Cummins intake horn?” It’s a very fair question, and the answer is pretty simple. Intake horn is simply another word for an intake manifold. Some also refer to it as an intake manifold tube elbow.
Check out the above picture as that basically paints the full picture of an intake horn upgrade. We may use intake horn or intake manifold interchangeably in this guide. Anyways, as simple as an intake horn may seem there’s a lot that goes into these upgrades. We’ll discuss some of the best 6.7 intake horn upgrades along with benefits and other details.
Benefits Of Intake Manifold Upgrades
Some question the power and performance benefits of intake horn mods. Is the 6.7 Cummins intake horn worth it? That question can vary depending on your goals for the Ram 2500/3500 truck. It’s probably not necessary on lower power builds with minimal mods. However, the further you push the 6.7L diesel the more benefits you’ll see. Even on lightly modded trucks there are still a number of benefits including:
- 5-15+ horsepower
- 10-20+ torque
- Lower EGT’s
- Better flow
- NPT ports
With fewer mods on the 6.7 Cummins you may only see gains around 5 horsepower. The stock intake manifold flows pretty well, but with enough power you can overwhelm the manifold. That’s where you’ll see the biggest gains from intake horn mods. Ram 6.7L power gains can be up to about 15hp and 25 lb-ft. EGT’s will also improve with some seeing EGT’s drop by about 50-100°F.
Flow through the intake horn can increase by about 25-50+% depending on the specific manifold. On top of that, most included about 2-5 1/8″ NPT ports. These allow you to easily integrate gauges, methanol injection, nitrous, and more. It’s great to have if you’re looking to really take the 6.7 Cummins to the next level.
6.7 Cummins Intake Horn Downsides
A few downsides may exist for some Ram 2500 & 3500 owners. They’re generally not huge downsides, but it varies from person to person. A few considerations before buying a 6.7 Cummins intake horn upgrade are:
- Better power mods for the price
- Some require factory emissions delete
If you’re just doing basic bolt-ons like a tune and intake then there isn’t much need for an intake manifold. Yes, it can still help EGT’s and may look better in the engine bay. There are better 6.7 Cummins upgrades for the price on lightly modded trucks, though.
Additionally, some factory emissions equipment hooks up to the intake manifold – such as the EGR valve. Many like to delete these emissions systems anyways, but there are legal concerns around that. Certain 6.7 Cummins intake manifold upgrades don’t have the connections, so they require deletes. Not a huge concern since there are some options that allow you to keep this.
Best Ram 6.7 Cummins Intake Horn Mods
With the basics out of the way it’s time to dive into a few of the best Dodge/Ram 6.7 Cummins intake horn upgrades. Please note – this is not an exhaustive list and plenty of great choices exist. These are just a few of our favorite options for various needs and budget. Our goal is to list a couple popular brand name products and a few solid budget choices.
1) 6.7L Banks Monster Ram Intake Manifold System
This certainly isn’t the cheapest option around. However, if you’re into 6.7 Cummins upgrades then you’ve definitely heard of Banks. They make awesome products, but you do have to pay for their brand name and proven, quality products. The same is true of their 6.7 Cummins Monster Ram intake horn. It does retain all emissions equipment, and is 50 state legal.
Their gen 2 system flows 936 cfm, which is 122% more than the stock intake manifold. Probably overkill with light mods, but this thing will keep up with air-flow for insane power and torque builds. It also offers 4 1/8″ NPT ports. There are too many awesome features to dive into all of the specifics, but be sure to check out the Banks option. The price is the only downside to what’s an otherwise perfect and legal product.
Price: $549 – 615+
Buy Here: Banks 6.7 Cummins Monster Intake System
2) 6.7 Cummins GDP Intake Horn Upgrade
Glacier Diesel Power (GDP) is another awesome company in the 6.7 Cummins aftermarket mods space. Here we’re talking about their Mega-Flo S-3 Intake Manifold. It’s a clean looking product as pictured at the beginning of the article. There’s some great designs to help maximize flow with the 5 bolt mounting instead of 6 bolts.
The GDP 6.7 Cummins intake horn has a whopping 5 1/8″ NPT ports. Plenty of flexibility for gauges, methanol injection, and whatever else you can think up. At $329 it includes all manifolds, mounting bolts, plugs, and an instruction manual. For a proven product from a brand name it’s a good price for what this 6.7L turbodiesel manifold has to offer.
Buy Here: GDP 6.7 Cummins Intake Manifold
3) DNA Motoring 6.7 Diesel Intake Horn
This is a true budget option and a bit of a toss up. It’s as basic as an intake manifold upgrade comes for the 6.7 Cummins turbodiesel. There are no connections for emissions, so you’ll need all of the deletes. Additionally, fitment and quality may be a concern here but that’s standard with an $83 manifold. As long as it fits well and bolts-up without leaks that’s all you really need, though.
On a budget we wouldn’t mind taking a risk on the 6.7 Cummins intake horn from DNA Motoring. It’s stainless steel and looks OK for the price point. The intake manifold also uses a 3.5″ inlet to dual 3″ mandrel bent tubes. You’ll also get 2 1/8″ NPT ports, which is likely enough for most. Those going for big power builds should find a higher quality manifold with more NPT ports.
All that said, if you want to try this out for just over $80 we wouldn’t blame you by any means. It’s not going to hurt anything as long as it bolts up without any leaks. The product is also on Amazon Prime for quick shipping and easy returns if something does go wrong. May be a waste of time, but at least the risk isn’t huge.
Ram 6.7 Cummins Intake Horn Summary
An intake horn on the 6.7 Cummins simply refers to the manifold. Intake manifold upgrades are a common topic when it comes to the 2007-2018 Ram 2500 & 3500 trucks. It’s a simple bolt-on mods that offers a number of benefits at a reasonable price.
Gains of 5-15 horsepower and 10-20+ lb-ft are possible. The biggest gains are seen on 6.7L turbodiesel engines pushing the limits on turbo upgrades. However, even on lightly modded trucks you still get some power, lower EGT’s, better flow, and access to NPT ports. Not bad for a mod that’s generally in the $250-500 price point.
We like the Banks system for it’s integration with emissions equipment. There are tons of great features and it offers huge flow improvements, but it is expensive at $500+. GDP also has a great option for a bit less money. Otherwise, you can find 6.7 Cummins intake horn mods on a budget. We quickly examined an $83 option that should work so long as it bolts up properly without leaks.
What’s your experience with 6.7 Cummins intake horn mods? Are you considering one?
Leave a comment and let us know!