aFe 51-73120-B is the black-tube Momentum XP Pro DRY S intake for qualified 2017-2020 F-150/Raptor 3.5L twin-turbo applications. One 21-91115 dual-inlet filter uses three oil-free synthetic layers. Two 3-inch wrinkle-black aluminum tubes, shared housing and silicone connections retain the original temperature sensor and wastegate-control component.
Current exact manufacturer page identifies F-150 Raptor 2017-2020 with 3.5L twin-turbo EcoBoost. The current shared manual explicitly names both F-150 and F-150 Raptor 2017-2020 3.5L and this selected finish/media. Original model-only F-150 2017-2020 row, bounds and tags remain conditional on that actual engine and inlet/vent/sensor arrangement. Older mirrored manuals and exact retailers include 2.7L coverage absent from the current manufacturer-hosted cover; this remains a source/version hold, not a new approval or physical-incompatibility declaration. No V8, PowerBoost, later Raptor R or different-generation hardware is inferred.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2017-2020 | Ford | F-150 | 3.5L twin-turbo; actual inlet and vent configuration required |
Verify 51-73120-B against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
| Brand | aFe POWER |
| Manufacturer Part Number | 51-73120-B |
| Selected filter | One 21-91115 Pro DRY S dual-inlet element; three oil-free synthetic layers |
| Tube pair | 05-73120B1 / 05-73120B2; black aluminum, 3-inch diameter |
| Housing | 05-5030024B3 |
| Elbows | 05-01445 4 x 3 inches / 05-01446 3 x 3 inches |
| Tube clamps | One #064 03-50006; three #044 03-50019 |
| Breather / small clamps | 05-01444, 5/8-inch ID; two 03-50077 mini #008 |
| Retention / trim | Two 03-50616 clips; 05-00072 7/16-inch trim, 15.5-inch length |
| Vent insert | 05-01405; slash cut faces turbo inlet, must not rotate |
| Optional harness mounting | Two marked 1/4-inch housing holes; push-clip positions relocated and retaped |
| Torque / check | No numeric torque; check bolts, clamps and connectors after 200 miles |
| Filter height source conflict | Current product overview says 7 inches; linked replacement element specifies 9 inches. Confirm actual boxed element revision. |
| Dry bench flow | 540 versus original 450 CFM at 7 inches H2O; 20% increase, distinct from oiled 580 CFM |
| UPC | 802959543573 |
| 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 | 21-91115 | Selected Pro DRY S oil-free dual-inlet element |
| 1 | 05-5030024B3 | Shared housing |
| 1 | 05-73120B1 | Black tube 1 |
| 1 | 05-73120B2 | Black tube 2 |
| 1 | 05-01444 | 5/8-inch-ID silicone breather hose |
| 1 | 05-01445 | 4 x 3-inch silicone elbow |
| 1 | 05-01446 | 3 x 3-inch silicone elbow |
| 1 | 03-50006 | #064 clamp |
| 3 | 03-50019 | #044 clamps |
| 2 | 03-50077 | Mini #008 clamps |
| 2 | 03-50616 | Retainer clips |
| 1 | 05-00072 | 15.5-inch edge trim |
| 1 | 05-01405 | Directional vent insert |
The shared bill lists three filter media and three tube finishes as alternatives; this selection includes one dry filter and two black tubes. Current overview describes a 7-inch filter, while its linked exact replacement element specifies 9-inch height; actual supplied revision is not certified from those conflicting descriptions. No replacement MAF, new wastegate controller or IAT extension is itemized. Original temperature sensor, housing grommet, mounting screw, control component and harness are retained. Current blue and black manual PDFs are byte-identical to the previously fully illustrated twenty-two-page family manual; their exact bill and figures A-O were reconciled without mixing another inlet family.
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 21-91115 dual-inlet Pro DRY S oil-free filter and two black tubes, B1 and B2. Other media and finishes are alternatives.
Is a new MAF or controller included?No. The original temperature sensor and wastegate-control components transfer; no new MAF, extension harness or controller is listed.
Which way does the vent insert face?The exact manual directs its slash cut toward the turbo inlet. It must seat fully and must not rotate.
Must the valve-cover end of the vent line be removed?No. The procedure releases the inlet end while retaining and protecting the original vent sensor and harness.
Is drilling always required?No. Two marked 1/4-inch holes are optional for the original harness push clips; choosing this route also requires relocating and retaping those clips.
Is 2.7L coverage newly added?No. Older mirrored/retailer coverage differs from the current manufacturer-hosted 3.5L cover and remains a version/source hold.
Is the dyno an independent selected dry test?The sheet does not identify filter media and is also linked from the oiled page. Its marked 2800-rpm differences and run maxima are qualified family results, not independent dry certification.
What torque and check interval apply?No numeric torque is specified. Check bolts, clamps and connectors after 200 miles and verify all retained control, vent and coolant-line routing.
Verify aFe 51-73120-B. Read the exact manual on a cool engine. Unplug the original temperature harness, unclip the coolant line and remove original intake tubes, filter and upper box. Release the rear wire and wastegate-control component, remove the factory screw and two plastic rivets and lift out the housing. With the original turbo inlet tubes still installed, access the driver-side valve-cover vent connection without disconnecting its valve-cover end or damaging its sensor/harness. Release the specified clip, insert the vent piece fully with its slash cut facing the turbo inlet, verify it cannot rotate and reconnect the fitting with a retention check. The manual offers code-reader clearing or battery disconnection for codes, rather than a general mandatory battery-removal step. Transfer the housing grommet and fit 15.5-inch trim. Optional harness retention uses two marked 1/4-inch holes; if chosen, relocate and retape the original push clips as illustrated. Seat the new housing in its original grommets, restore the factory screw, fit the supplied rivets and reconnect the wastegate-control component at its bracket. Lock in the single selected dry filter. Preassemble elbows/clamps loosely and transfer the original temperature sensor. Fit tube B2 into the filter and align its coupling. Fit the breather hose and two small clamps at its bottom, with clamps accessible, and reconnect temperature wiring. Fit tube B1 at the other filter flange, align and secure its lower coupling, then join the breather bridge. Restore secure line/harness routing, tighten all clamps/screws and remove window protective film. No numeric torque is specified. Check bolts, clamps and connectors after 200 miles.
The actual manufacturer-linked family flow chart identifies Pro DRY S 540 versus original 450 CFM at 7 inches H2O, a 20-percent increase. Its 580-CFM oiled row is a separate media choice. The current dry page links the same family dyno as the oiled version; that sheet identifies an aFe intake but not filter media or an independent black-finish or Raptor test. At 2800 rpm the marked differences are 12.62 hp and 23.74 lb-ft; run maxima differ by 4.64 hp and 14.32 lb-ft. Both October 6, 2017 runs use SAE 1.01, original exhaust, fifth gear and blade fan at different times. This does not independently certify a selected dry-media gain. Current overview says 7-inch filter height, while its linked exact 21-91115 replacement specifies 9 inches; confirm actual boxed revision. The current exact twenty-two-page manual explicitly identifies this media and black finish; it is byte-identical to the previously fully viewed family manual. All pages were reread and the exact bill reconciled, without borrowing other inlet-family steps. Optional housing harness mounting uses two marked 1/4-inch holes and relocated, retaped original push clips. The manual has no mandatory battery-disconnection step; battery disconnection is only one stated method of clearing codes. Current page California-DMV restriction remains, despite older manual race-use wording. Older 2.7L retailer/mirror coverage differs from the current 3.5L manufacturer cover and remains a source/revision hold; no new 2.7L scope is inferred.
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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