6.7 Cummins Intake Horn Compatibility by Year: 2007.5-2024 Ram Fitment Guide

Updated on September 24, 2026.

A 6.7 Cummins intake horn is not universal across 2007.5–2024 Ram trucks, even when two castings appear to share the same flange pattern. A mismatched horn can place a sensor in the wrong location, stretch a wiring pigtail, interfere with a high-pressure fuel line, miss a support bracket, or seal poorly against the intake plate. Any of those errors can create a fault code, boost leak, fuel leak, or contact problem after the engine moves under load.

Quick answer: Treat 2007.5–2012, 2013–2018, and 2019–2024 Ram 2500/3500 pickups as different intake-horn fitment groups. A similar flange does not prove compatibility. Before ordering, verify pickup versus chassis-cab construction, single- or dual-alternator equipment, high-pressure fuel-line clearance, sensor and EGR connections, and whether the truck will retain, replace, or delete the factory grid heater.

6.7 Cummins Intake Horn Compatibility Chart

SPELAB separates 6.7L Cummins pickup intake horns into three year-specific product families. That split is a practical warning against forcing one horn across every 2007.5–2024 application.

The pickup SKUs in this table identify the listed intake-only, standard-color variants. Bundles, custom colors, standalone heater parts, and chassis-cab kits use different numbers, so match the complete SKU shown for the selected product option. For a 2007 truck, verify that it is a 2007.5 application equipped with the 6.7L Cummins; an earlier 2007 truck with the 5.9L Cummins belongs to a different product family.

Intake Horn, Intake Manifold, Plenum, and Grid Heater Are Not the Same Part

• Intake horn or intake elbow: The curved pressurized-air passage feeding the engine-side intake assembly.
• Intake plate or plenum cover: The flatter component below or beside the horn that distributes air into the cylinder head passage.
• Grid heater: The electric intake-air heating element used to support cold starting and reduce white smoke during warm-up.
• Charge-air pipe: The boosted pipe between the intercooler and intake connection. Its boot diameter and alignment still affect horn fitment.

Parts catalogs and owners often use “intake manifold” and “intake horn” loosely. Before ordering, identify whether the package contains only the elbow, an intake plate, a heater-retaining plate, a heater-delete plate, a replacement fuel line, sensors or plugs, boots, clamps, gaskets, and mounting hardware.

2007.5-2012 6.7 Cummins Intake Horn Fitment

The 2007.5–2012 6.7L Cummins fitment group spans late third-generation and early fourth-generation Ram trucks. The shared engine family does not make every engine-bay bracket, wiring route, sensor location, EGR connection, charge-air boot, or previous repair identical, so compare the original hardware with the selected 2007–2012 product variant before disassembly.

What to Compare

• Count every sensor opening and identify its thread or retaining method.
• Photograph the sensor connectors before unplugging them and confirm the new location does not tension the harness.
• Compare the EGR connection and any mixer or throttle hardware with the new horn.
• Check the dipstick tube support and every nearby hard line. A loose tube can fatigue at its lower mount.
• Measure the charge-air boot and confirm the new inlet angle does not preload the boot.
• Identify whether the factory grid heater stays, is replaced by a heater-retaining upgrade, or is removed.

Do not assume a spare threaded hole is the correct MAP port. An auxiliary 1/8-inch NPT port may be intended for a boost reference or aftermarket sensor, while an OEM sensor can use a different thread, seal, depth, or retaining screw. Compare the supplied instructions and physical parts before transferring anything.

2013-2018 6.7 Cummins Intake Horn Fitment

Ram pickups adopted DEF/SCR hardware for the 2013 model year, but the DEF tank itself does not decide intake-horn compatibility. The useful fitment checks are under the hood: EGR and throttle hardware, sensor placement, intake-heater arrangement, hard-line clearance, and the supplied brackets or replacement line.

High-Pressure Fuel-Line Clearance Is a Stop-Work Check

Never force a 6.7L Cummins intake horn against a high-pressure fuel line or reshape an injector line by eye. Common-rail diesel fuel can penetrate skin and cause a medical emergency even when the surface wound looks small. If the kit supplies an application-specific replacement line, use it only for the listed model year and configuration, follow the specified routing and support points, and replace a damaged sealing connection instead of applying thread sealant.

1. Set the horn in place without tightening it.
2. Confirm the flange sits flat without using bolts to pull it into position.
3. Check hard-line and wiring clearance around the full horn, not only the most visible side.
4. Install every support bracket before final torque.
5. After torque, verify clearance again with the boot and EGR-side hardware installed.
6. Run the engine, inspect for fuel or boost leakage, then recheck after a full heat cycle.

For a model-specific walkthrough, use the 2018 Ram intake horn installation procedure as a supplement to the instructions supplied with the exact kit. Do not carry its torque values or routing assumptions into another year without verification.

2019-2024 6.7 Cummins Intake Horn Fitment

A 2018 intake horn should not be treated as a bolt-on part for a 2019 Ram 6.7L Cummins. Cummins documented a compacted-graphite-iron block, a new cast-iron cylinder head, hydraulic lash adjustment, revised rotating parts, a larger VGT, and a new high-pressure fuel system for the 2019 generation. SPELAB also lists 2019–2024 trucks under a separate intake-horn SKU family.

On a 2019–2024 pickup, verify firewall-side and brake-system clearance, but do not assume every truck has the same interference point. Compare the master-cylinder area, harness routing, EGR plumbing, intake-heater connections, dual-alternator equipment, and accessory brackets on the actual vehicle. A horn that touches another component at rest can strike it harder when the engine rolls under payload or towing load.

Pickup vs. Chassis Cab: The Fitment Split Owners Miss

A Ram 3500 pickup intake kit should not be assumed to fit a Ram 3500 Chassis Cab, and Ram 4500/5500 applications require a listed commercial-truck configuration. Pickup and chassis-cab trucks can use different engine ratings, calibrations, alternator layouts, accessory clearance, heater hardware, and under-hood packaging. SPELAB offers separate complete chassis-cab kits for compatible 2007–2024 Ram 3500/4500/5500 applications, including listed dual-alternator configurations.

Standard-color chassis-cab kits typically retail around $699. Confirm the selected kit’s current price, included heater hardware, fuel line, brackets, finish, alternator compatibility, and exact truck application before ordering.

Seven Fitment Checks Before You Remove the Stock Horn

If any item is unclear, send the seller the VIN, build date, truck model, pickup/Chassis Cab status, emissions configuration, old horn part number, and clear photos. “It is a 6.7 Cummins” is not enough fitment information.

Installation Time, Tools, and Torque

A horn-only installation often takes roughly 3–5 hours on a clean, stock pickup when the installer has the correct tools and no seized hardware. A grid-heater change, replacement high-pressure fuel line, heavy carbon buildup, EGR-side work, damaged threads, or a crowded chassis-cab layout can extend the job to roughly 5–8 hours or more. Plan for metric sockets, required Torx bits and line tools, a calibrated torque wrench, clean caps for opened lines, lint-free wipes, an inspection light, a mirror, and a scan tool.

The 18–20 ft-lb value in the linked SPELAB procedure applies only to the intake-manifold fasteners identified in that procedure and is not a universal 2007.5–2024 Ram torque specification. Tighten those identified fasteners gradually in the specified sequence. Use 18 ft-lb for grid-heater plate hardware only when the instructions for the exact selected kit state that value; high-pressure fuel fittings, sensors, 1/8-inch NPT plugs, brackets, and other fasteners require their own procedures and do not inherit either number.

Use the 6.7 Cummins installation and torque reference together with the instructions for the selected kit and factory service information for the exact truck. Tighten clean, serviceable threads in the specified sequence. Extra torque will not safely flatten a warped part or close a gap caused by trapped wiring, a shifted gasket, or incorrect fitment.

What to Do If the Wrong Intake Horn Is Already Installed

If the engine has a fuel smell, wet diesel, a visible mist, a line touching the horn, or a new ticking or hissing sound near the common-rail plumbing, shut it down. Do not use a finger or bare hand to search for a high-pressure leak. Diesel injected through skin can leave a tiny surface wound while causing severe internal injury; seek emergency medical care immediately after any suspected injection injury.

1. Stop driving and remove load. Do not tow, rev the engine, or “see if it clears” when a hard fuel line, brake component, wiring harness, or firewall insulation is in contact with the horn.
2. Make the system safe. Key the truck off, keep ignition sources away, and follow the factory procedure for battery disconnection and fuel-system depressurization. Common-rail pressure can remain hazardous after shutdown.
3. Remove the horn instead of bending parts around it. Cap every opened passage and line with the proper clean caps. Protect the cylinder-head intake opening from bolts, carbon, and gasket debris.
4. Reject damaged fuel hardware. Replace any kinked, chafed, flattened, scored, or leaking high-pressure line with the exact application part. Do not straighten and reuse it unless the vehicle manufacturer's service information explicitly permits that repair.
5. Inspect witness marks. Look for polished contact spots on the horn, hard lines, reservoir, brackets, wiring, insulation, and charge-air boot. Check the flange with a straightedge and inspect threads and bolt bosses for pull-out or cracking.
6. Reconfirm the full SKU and parts stack. Compare the horn, gasket, heater plate, sensor locations, EGR-side hardware, supplied fuel line, brackets, and boot before reassembly.
7. Verify the repair before road load. Use the correct torque sequence, inspect at idle without touching pressurized lines, scan for codes and implausible sensor data, pressure-test the charge-air tract, and recheck all clearance after a full heat cycle. A qualified diesel shop should test any suspected high-pressure leak.

What an Intake Horn Can and Cannot Fix

A larger, rigid intake horn can provide a different flow path, stronger mounting structure, and useful gauge ports. It may support a broader airflow package on a modified truck. It does not automatically add a fixed percentage of horsepower, lower EGT by a guaranteed number, or improve MPG on every stock truck. Those claims require controlled before-and-after testing at the same load, ambient conditions, calibration, fuel, and measurement points.

When carbon is the actual service problem, follow a controlled diesel intake cleaning process. Keep loosened debris out of the cylinder head and never let abrasive material or solvent pool in an open intake port.

After installation, a regulated charge-air leak test often begins around 10–15 psi, but the applicable service procedure and test equipment determine the safe pressure. Never connect unregulated shop air directly to the intake. With key-on and the engine off, MAP should typically be close to local barometric pressure—often within about 1–2 psi after allowing for elevation, weather, sensor tolerance, and scan-tool resolution.

Grid Heater: Retain, Upgrade, or Delete?

Grid-heater strategy is a separate decision from intake-horn fitment. Ram instructions state that the intake-air heater supports starting and reduces white smoke during warm-up; below 0°F (-18°C), the manual describes two preheat cycles under defined conditions and warns that excessive cycling can damage the heater elements or reduce battery voltage. A North Dakota work truck therefore has a different requirement from a fair-weather build.

• Retain the factory heater: Best when OEM cold-start behavior, warranty position, and factory circuit operation are priorities.
• Use a heater-retaining upgrade: Relevant when the owner wants a different plate or horn but still needs cold-weather heating. Confirm wattage, wiring, relay load, and control strategy.
• Install a delete plate: Removes the factory heating element from the intake path but can affect cold starts, white smoke, diagnostic codes, warranty, and emissions compliance. It is not automatically the right choice for a daily-driven cold-climate truck.

For failure symptoms and inspection choices, see the 6.7 Cummins grid-heater bolt guide. Cummins owners and aftermarket suppliers often call the mechanical concern the “killer grid heater bolt” or “killer grid heater nut.” If the electrical stud or retaining hardware becomes loose, heat-damaged, or fractured, metal debris may enter the intake and can cause severe engine damage if it reaches a cylinder; Cylinder No. 6 is frequently cited in owner and aftermarket reports, but the exact failure path depends on heater design, electrical arcing, vibration, hardware condition, and service history. This ingestion risk is separate from NHTSA recall 23V-060, which covers an under-hood fire risk from a shorted Generation 1 solid-state intake-heater relay in certain 2021–2023 Ram heavy-duty trucks. Recall inclusion is VIN-specific, so check the truck at the NHTSA recall lookup before modifying the circuit.

Real-World Setup Decisions

• Towing: Prioritize leak-free joints, line clearance, accurate pressure data, EGT diagnosis, and cold/hot retorque instructions over a large advertised tube size.
• Payload and Jobsite: Inspect brackets and hard lines after washboard roads, long idle periods, and repeated heat cycles. Dust control and filter sealing matter more than polished aluminum.
• Off-roading: Use rigid supports and adequate boot engagement. Engine movement and chassis twist can expose a clearance problem that never appears at idle in the garage.
• Extreme heat: Log boost, intake temperature, coolant temperature, and EGT under a repeatable load before blaming the horn.
• Extreme cold: Preserve a proven intake-heating plan, healthy batteries, correct oil, winter fuel management, and block-heater access.

Current Product Options and Cost Reference

Depending on the required configuration, standard-color 6.7 Cummins intake options typically retail around $539 for an intake-only pickup variant, about $617 for an intake-plus-grid-heater-delete bundle, about $169 for a standalone delete plate, and about $699 for a complete chassis-cab kit. The separate 3.5-inch heated intake typically ranges from about $199 without a delete plate to about $349 with one, depending on the selected configuration.

The 3.5-inch heated intake is currently listed for compatible 2007–2024 Ram 2500/3500 pickups and is not listed for chassis-cab applications. The 2019–2024 version includes a specialized replacement fuel line for the later factory routing. Prices, inventory, finishes, included parts, and year selections can change, so read the complete variant name and confirm whether the cart contains a horn, heater component, delete plate, bundle, or chassis-cab package.

Frequently Asked Questions

Official Sources

• Cummins 2019 6.7L engine update
• Ram 2022 intake-air-heater starting procedure
• NHTSA recall 23V-060 report
• Ram 2012-2016 intake-grid-heater service communication