aFe 51-72104 is the Momentum GT oil-free intake for 2017-2018 Ram 2500/3500 6.4L HEMI configurations without a mass-airflow sensor, including Power Wagon. One reinforced Pro DRY S filter works with molded XLPE housing and tube. The original air duct, temperature sensor and CCV connection are retained, and the AC-line isolation mount reattaches using supplied M6 hardware.
Current exact manufacturer page and twenty-page manual identify Ram 2500/3500 and 2500 Power Wagon 2017-2018 with 6.4L HEMI and no MAF. This includes qualified regular HD models, correcting the Power-Wagon-only title emphasis. Exact selected dry retailer tables restore 3500 Laramie 2017-2018. All original thirteen named rows and bounds remain, including Lone Star 2017 only. No 2016 earlier sensor arrangement, diesel or later-generation application is inferred.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2017-2018 | Ram | 2500 | Big Horn |
| 2017-2018 | Ram | 2500 | Laramie |
| 2017-2018 | Ram | 2500 | Laramie Longhorn |
| 2017-2018 | Ram | 2500 | Limited |
| 2017-2018 | Ram | 2500 | Power Wagon |
| 2017-2018 | Ram | 2500 | SLT |
| 2017-2018 | Ram | 2500 | Tradesman |
| 2017-2018 | Ram | 3500 | Big Horn |
| 2017-2018 | Ram | 3500 | Laramie Longhorn |
| 2017-2018 | Ram | 3500 | Limited |
| 2017 | Ram | 3500 | Lone Star |
| 2017-2018 | Ram | 3500 | SLT |
| 2017-2018 | Ram | 3500 | Tradesman |
| 2017-2018 | Ram | 3500 | Laramie |
Verify 51-72104 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
| Brand | aFe POWER |
| Manufacturer Part Number | 51-72104 |
| Product line | Momentum GT cold air intake |
| Selected filter | One 21-91110 Pro DRY S; three oil-free synthetic layers; metal reinforcement; 8-inch height |
| Filter dimensions | 6-inch flange; 8-inch base and inverted top |
| Main materials | Molded XLPE housing and tube; silicone coupling; aluminum CCV fitting |
| Sensor configuration | No MAF; original temperature sensor transfers |
| Temperature fitting qualification | Primary calls injection molded; manual calls billet. Actual supplied material/revision remains qualified |
| Mounting | Two original lower grommets, two supplied side grommets and retained AC-line isolation mount |
| Bench flow | Selected Pro DRY S 550 versus original 435 CFM at 7 inches H2O; approximately 26.4% |
| Dyno qualification | Actual linked earlier 2016 54-72103 V2 oiled basis; not an independent selected dry or newer no-MAF test |
| Emissions | Current manufacturer and own manual state not CARB exempt |
| UPC | 802959543634 |
| WARNING | This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov. |
| Quantity | Manufacturer service part | Component |
|---|---|---|
| 1 | 21-91110 | Selected Pro DRY S oil-free reinforced filter |
| 1 | 05-72104B1 | Intake tube |
| 1 | 05-72103B2 | Housing |
| 1 | 05-00937 | Airbox plug |
| 1 | 03-50267 | Large T-bolt clamp |
| 1 | 03-50032 | M6 hex-head bolt; length unspecified |
| 1 | 03-50070 | M6 flat washer |
| 1 | 03-50071 | M6 lock washer |
| 2 | 03-50537 | Urethane side-tab grommets |
| 1 | 05-01339 | Large CCV fitting |
| 1 | 03-50167 | Rubber sensor-fitting grommet |
| 1 | 05-01454 | Air-temperature sensor fitting |
| 1 | 05-01389 | Silicone coupling; manual labels hump, primary describes double hump |
| 2 | 03-50498 | Smaller T-bolt clamps, 3-9/16 to 3-7/8 inches |
Shared-bill Pro 5R and Pro-GUARD elements are alternatives, not additional supplied filters. Reuse the original air duct, two lower rubber housing grommets, remaining AC-line isolation mount, IAT, CCV hose and engine cover. One AC-line isolation mount is removed as illustrated; the remaining one slides into alignment with the new housing threaded insert. The primary and manual disagree on temperature-adaptor material; actual supplied revision remains qualified. Housing and tube are molded XLPE. Retailer carbon-fiber accent descriptions do not establish a carbon-fiber housing.
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
One 21-91110 Pro DRY S filter with three oil-free synthetic layers, metal reinforcement and 8-inch height.
Is this limited to Power Wagon?Current manufacturer and exact manual also identify qualified 2017-2018 Ram 2500/3500 6.4L configurations without MAF.
Does a MAF transfer?This exact newer configuration has no intake MAF. The original temperature sensor transfers to the supplied adaptor.
How does the AC line attach?The retained isolation mount slides into alignment with the housing rear insert and attaches using supplied M6 bolt and both washers.
Are all four housing grommets new?No. Two original lower rubber grommets transfer, and two supplied urethane grommets fit the side tabs.
Should the CCV fitting bottom out?No. It is NPT, must not be overtightened and retains a normal gap between the hex and tube.
Does the linked dyno independently test this dry no-MAF version?It identifies earlier 2016 54-72103 V2 oiled intake and is qualified historical manufacturer evidence, not a selected dry test.
What torque and follow-up apply?No numeric torque or M6 bolt length is specified. Check bolts, clamps and connectors after 100-200 miles and verify engine-cover clearance.
Verify aFe 51-72104. Read all twenty pages and figures A-N. Work on a cool engine and disconnect negative battery terminal. Release engine-cover front mounts and pull forward to unclip rear mounts. Disconnect IAT and original CCV hose, loosen original tube clamps and remove tube. Remove upper airbox and filter, release AC-line fasteners and other hard/coolant-line retention. Lift housing from posts while still in vehicle, release original air duct tabs and remove housing and duct. Remove the illustrated AC-line isolation mount. Transfer two original lower grommets to new housing and fit both supplied side-tab urethane grommets. Reconnect original air duct. Fit sensor grommet/adaptor and original IAT. Install CCV NPT fitting without overtightening; a gap at its hex is normal. Seat housing and duct on all four mounts. Slide retained AC isolation mount to align with rear threaded insert and attach using supplied M6 bolt, lock washer and flat washer. Fit selected filter and large housing clamp loosely. Fit silicone coupling and smaller clamps loosely at throttle body. Install tube while prealigning original CCV hose, then ensure no gap around tube end and filter flange. Align and tighten clamps with engine-cover clearance checked. Reconnect IAT and click CCV hose past adaptor step, then tug-check retention. Restore rear and front engine-cover mounts and fit optional airbox plug if desired. No numeric torque is stated. Check bolts, clamps and connectors after 100-200 miles.
The actual family bench chart identifies selected Pro DRY S at 550 versus original 435 CFM at 7 inches H2O, approximately 26.4 percent. Pro 5R 590 and Pro-GUARD 540 CFM are different media. The dry page links a dyno that explicitly identifies an earlier 2016 Power Wagon and 54-72103 V2 oiled intake tube. It is historical manufacturer basis, not an independent selected dry or 2017-2018 no-MAF test. Marked 5613-rpm differences are 15.44 hp and 14.45 lb-ft, while run maxima differ by 15.42 hp and 11.68 lb-ft. Both September 2, 2016 runs use original tuner, headers and exhaust, 10-percent preload, blade fan and second gear; intake notes auxiliary scoop covered. Baseline SAE 1.03 versus intake 1.01 and weather differ. Current manufacturer and exact manual state not CARB exempt and unavailable for purchase in California or use on California-registered vehicles. Retailer D-550-13 claims do not override that current exact manufacturer restriction; full applicable order remains unverified and the prior challenge was not retried.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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