Updated on August 23, 2026.
Full disclosure up front: SPELAB provided the intake horn kit featured in this article for @V-BELT and SON's install and review. Sam's 6.7 Cummins is seven years and 74,000-plus miles into ownership, kept close to stock the whole way — a Defender aluminum bumper and a set of rear airbags, nothing else. That's the kind of long-term, mostly-stock truck where a preventive weak-point fix matters more than a horsepower chase.
"All I've ever done to this truck is the bumper and the airbags. That's it. Everything else? Stock."
The Real Problem: The Grid Heater Terminal Failure
Sam's reason for doing this wasn't chasing airflow numbers. It's a documented failure mode on the 6.7 Cummins intake horn, and it's serious enough that FCA issued a technical service bulletin on it: the grid heater's power terminal can overheat, deform, and work loose inside the intake manifold cover, and if debris breaks free into the intake tract, it's most commonly pulled straight into cylinder six.
"I heard about some little stud falling off and going through your intake, and for some reason, the target's number six cylinder. So, we're going to be addressing that today."
That's not internet folklore — FCA's own bulletin (covering fault codes P2609 and P0542) describes inspecting the grid heater terminal for overheating and "plastic over-mold being deformed," confirming there should be no back-and-forth movement of the terminal, and checking the bus-bar bolt for arcing. It specifically flags foreign-object engine damage landing "primarily on the #6 cylinder." You can read the bulletin itself here. It does not cite EGR carbon buildup as a cause, so we're not going to claim that either — the terminal itself overheating and loosening is the documented mechanism.
If you already suspect a loose terminal: don't keep driving on it hoping it holds. A terminal with detectable play is a foreign-object-damage risk every time the engine runs. Get it inspected and addressed before your next start if you can.
For a walk-through of how to actually inspect for this before it becomes a major repair, see this step-by-step terminal-failure diagnostic guide.
What's Actually in the Box
Sam's first impression during unboxing was that SPELAB didn't skimp on hardware:
"Wow, there's actually just keep going... all of it, the gaskets, all the bolts... Not sure what those are for, but we got them. All kinds of just goodies here."
One correction worth making up front: SPELAB sells this upgrade in more than one material. The intake horn itself ships as either 201 stainless steel with a mirror polish or a cast aluminum alloy casting, depending on which product you order. The grid heater delete plate bundled into these kits is a separate part, genuinely CNC-machined billet aluminum with an anodized, brushed finish. Three parts, three different material specs — don't assume "aluminum" describes the whole kit.
The kit is built to be plug-and-play with the factory sensors and fuel rail: mounting points are reinforced, the airflow path is more open than the factory casting, and thermal expansion tolerances are accounted for. Even the small stuff — plugs for ports you're not using — shows this was designed by someone who's actually installed one.
Fitment: Which Kit Actually Matches Your Truck
SPELAB does not sell one universal "2007–2025" intake horn — there are two distinct product families, and picking the wrong one means a part that doesn't seal against your factory gasket surface.
| Kit | Model years covered | Horn material | EGR / tuning notes |
|---|---|---|---|
| 3.5" Performance intake manifold | 2007-2018 Ram 2500/3500 (Old-style casting); 2013-2018 for the New-style casting | 201 stainless steel, mirror polish | Manufacturer lists this casting as requiring an EGR delete to run; no separate ECU tune needed |
| High-flow intake manifold/horn | 2007-2024 Ram 2500/3500; separate Chassis-Cab kit for 3500-5500 (also fits dual-alternator engines) | Cast aluminum alloy | Works with EGR intact or deleted; no mandatory tuning |
| Grid heater delete plate (standalone) | 2007.5-2024 Ram 2500/3500 | CNC billet aluminum, anodized/brushed | Can be added to either horn above, or run with the factory intake horn still in place |
Sam's video doesn't state his truck's exact model year or which of these two horns he installed, and we're not going to guess on his behalf. What matters for your own order: confirm your Ram's model year and whether it's a standard pickup or a Chassis-Cab configuration first. This year-by-year compatibility breakdown covers sensor differences, fuel line routing, and cab configuration in more depth than a five-minute install video can.
Installation: A Hands-On Review
Sam described the swap as thorough but manageable for a DIYer with basic tools and a weekend:
"You actually got to take quite a bit of stuff off. The whole fuel rail and all that needs to come off. That's where it's not that much fun... But it's time to shine. It's time to get her done."
Working around the EGR system and the factory grid heater takes patience. During fuel rail and sensor removal, Sam tracked every connection carefully:
"It even came with all the plugs for the ports. I'm not using the 8-inch MBT stuff. So, we need to take this stuff off, need to take these studs off... Sensor comes off. 8mm all goes on to the new dog."
Treat this as fuel-system work, not a bolt-on accessory swap: relieve residual line pressure before disconnecting anything, replace any crush washers or seals that don't reuse cleanly, and torque fuel line fittings and sensor connections to spec rather than by feel. Before you drive it, idle the truck and visually check every reconnected fitting for weeping fuel or a boost leak — a loose sensor or line connection here can throw a fuel pressure or intake code that gets wrongly blamed on the new horn itself.
Airflow: Stock vs. SPELAB
The most visible difference once the two horns are side by side is the size of the air path itself:
"Look at just the absolute difference in size right there... Pretty different. You can see right there where the black sit just backs up and goes around the corner on both sides. And this one utilizes all the surface area that is allowed."
Removing the center pillar and opening the passage reduces restriction at the throttle body inlet. SPELAB's own spec sheet for the high-flow horn cites an 88% airflow increase over the stock casting, a 0.5-1 MPG improvement, and a 50-200°F drop in exhaust gas temperature — manufacturer-published figures without a disclosed test method (flow-bench conditions, baseline part, EGT probe location, load, or ambient temperature), so treat them as directional rather than a guarantee for your specific truck. Sam wasn't chasing peak horsepower, and you shouldn't expect one from this alone; the realistic win is smoother low-RPM breathing and less intake-side heat soak. For the fuller cost-benefit picture, this breakdown of whether the upgrade pencils out is worth reading before you buy.
With everything buttoned up, Sam's first take firing the truck back up was simple: "We've got zero restriction right here. Good deal."
Watch Sam's full install on the @V-BELT and SON channel.
Should You Delete the Grid Heater, or Just Upgrade It?
It's worth being straight about this trade-off instead of only listing the upside. A full grid heater delete does remove the terminal-failure risk for good, but Ram's own diesel supplement is explicit that the heated intake air system exists to improve cold starting and reduce white smoke during warm-up, and warns that "excessive white smoke and poor engine performance will result if manifold heaters are not recycled" in sub-zero starts. Deleting that function entirely can mean rougher cold starts and, on some trucks, a P2609 or P0542 fault code in cold climates — which is exactly why SPELAB also sells heating-element versions of these kits rather than only a delete plate.
Grid heater and intake manifold parts are also listed as covered components under Ram's federal emissions warranty for these trucks, which is a separate point from tampering law but worth knowing: modifying them isn't automatically "emissions-neutral" the way this space sometimes assumes. If your truck stays registered for street use, keeping a heating element in the loop is the more conservative choice, especially in a cold climate. If you're in a warm-weather state and want the full delete, read the real trade-offs of deleting the grid heater first.
Post-Installation Check: One 6.5-Hour Trip
To be clear about what's actually been verified here: the 74,000 miles is Sam's total ownership mileage before this install, not a post-install durability test. What we have documented after the swap is a single extended trip:
"We went on a 6 and 1/2 hour roundtrip… all systems go. No problems with the truck."
That's a legitimate first data point — no fuel leaks, no boost leaks, no check-engine light on a multi-hour highway run — but it's not 74,000 miles of testing, and we're not going to imply otherwise. Sam summed up his own reasoning for doing this in the first place:
"It's not a horsepower mod. It's about knowing my engine is safe. That peace of mind is priceless."
Since Sam's own video doesn't confirm the exact SKU he installed, don't assume the kit above is definitely his — it's SPELAB's broadest-fitment option, not a confirmed match to his build. Check your own model year against the fitment table above, or see the alternative configurations below.
| If your truck is... | Consider |
|---|---|
| 2007-2018 only, budget-focused | the 2007-2018 stainless intake manifold (requires EGR delete) |
| Any year, want the delete plate only | the standalone grid heater delete plate (billet aluminum, keeps your factory horn) |
| Cold-climate, want to keep a heater function | Look for the heating-element variant on the product page rather than the full-delete option |
Want to compare everything in one place? Browse the full diesel intake system collection for cold air intakes, manifolds, and elbows across Cummins, Powerstroke, and Duramax platforms.
Why This Upgrade Matters
- Addresses a documented grid heater terminal failure that FCA's own bulletin ties to cylinder-six damage
- Opens up airflow through the intake path versus the more restrictive stock casting
- Keeps OEM sensor integration on the high-flow kit, with no mandatory ECU tune
- Reduces intake-side heat soak, which helps long-term component life
Sam's case is a common one: a mostly-stock daily driver with real mileage on it, where closing off a known failure point matters more than chasing horsepower.
Technical Comparison: Stock vs. SPELAB Intake Horn
| Feature | Stock intake horn | SPELAB intake horn |
|---|---|---|
| Material | Factory composite/steel assembly (exact spec varies by model year) | 201 stainless steel or cast aluminum alloy, depending on kit |
| Grid heater terminal | Documented failure point (FCA TSB, codes P2609 / P0542) | Deleted or reinforced, depending on option selected |
| Airflow path | Restricted by center pillar | Open path, larger inlet |
| OEM sensor integration | Yes | Yes, on the high-flow kit |
| EGR compatibility | EGR intact by design | Depends on kit — SS version requires EGR delete; aluminum version works either way |
| Installation | N/A (factory part) | DIY-feasible with basic tools and fuel-system care; budget a full day |
Conclusion
Seven years and 74,000-plus miles into ownership, Sam's 6.7 Cummins is still running like a daily driver should. This swap didn't chase a dyno number — it addressed a documented failure point, with a single verified 6.5-hour trip and no issues since. Better airflow is a real but secondary bonus.
Whether you're daily-driving, weekend-wheeling, or putting on highway miles, addressing a known weak point before it fails beats fixing it after. Just confirm the kit that actually matches your truck's model year, EGR status, and climate — not just the one in the thumbnail.
Frequently Asked Questions
Q: Do I need a tune to run this intake horn?
A: No ECU tune is required for either version. The 6.7 Cummins ECU reads MAF and MAP sensor data and adjusts automatically to the improved airflow. The stainless-steel 2007-2018 casting does require an EGR delete to run, which is a separate modification from tuning — check the fitment table above before ordering.
Q: Is the intake horn or grid heater an emissions-regulated part?
A: Yes — Ram's own federal emissions warranty documentation lists both the grid heater and intake manifold as covered emissions-related parts. That's a different question from whether swapping the horn itself is illegal tampering, but it does mean these aren't emissions-neutral components. Deleting the grid heater's heating function specifically is the part most likely to matter here, since Ram's own documentation says that function reduces cold-start white smoke.
Q: Which model years does this kit actually fit?
A: SPELAB sells two separate intake horn products, not one universal fit. A 201 stainless steel version covers 2007-2018 and requires an EGR delete; a cast aluminum alloy version covers 2007-2024 (plus a Chassis-Cab variant for 3500-5500 trucks) and works with EGR intact or deleted. Confirm your exact model year and cab configuration before ordering.
Q: How difficult is installation, and what should I watch for?
A: Moderate, not beginner-easy. You're working on fuel-rail and sensor connections, not just bolting on an accessory. Relieve line pressure before disconnecting anything, torque fittings to spec, and idle the truck to check for fuel weeping or a boost leak before you drive it. Budget a full day, not an afternoon.
Q: Will I notice a performance difference after installation?
A: This isn't primarily a horsepower mod. The realistic gain is smoother low-RPM airflow and less intake-side heat soak over time. SPELAB's own published airflow and EGT figures aren't independently verified, so don't expect a dramatic seat-of-the-pants difference.
Q: Should I delete the grid heater completely, or keep a heating element?
A: Depends on climate. In warm-weather states, a full delete is a reasonable choice. In regions with hard winters, Ram's own documentation warns that removing the heating function can mean rougher cold starts and excess white smoke, and it can trigger a P2609 or P0542 code — which is why heating-element versions of these kits exist.
Q: What should I do if I already notice the grid heater terminal is loose?
A: Don't keep driving on it. FCA's technical service bulletin treats any detectable back-and-forth movement of the terminal as a failure condition, and the risk is foreign-object damage to cylinder six if it lets go. Get it inspected and addressed — whether that's an OEM repair or an upgrade like this one — before your next start if possible.
