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aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
aFe Momentum GT Pro DRY S Air Intake System 2018 Volkswagen Atlas V6-3.6L aFe AFE51-46405
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aFe Volkswagen Atlas 3.6L Momentum ST Pro DRY S Intake

aFe
AFE51-46405
802959544570
Cold Air Intakes
1 Units In Stock
$ 483.75 $ 387.00
$ 387.00

Volkswagen Atlas oil-free intake details

aFe 51-46405 is the Momentum ST oil-free intake for qualified Volkswagen Atlas 2018-2023 and Atlas Cross Sport 2020-2023 3.6L V6 applications. One dry filter, two molded tube sections and molded housing retain the original MAF cartridge and sensor. The factory cartridge is required and is not included.

Key Features

  • One 21-91108 Pro DRY S filter with three oil-free synthetic layers, 4-inch flange and 7.5-inch height.
  • Two separate molded tube sections, 05-46405B1 and 05-46405B2, and housing 05-46405B3.
  • One silicone bellows, two size 048 clamps, one size 056 clamp and auxiliary opening plug.
  • Original MAF cartridge, its two screws, three housing grommets and original scoop with rubber trim transfer.
  • Actual selected-media chart shows Pro DRY S 465 versus original 385 CFM at 7 inches H2O, approximately 20.8 percent.

Fitment

Own exact twenty-page manual explicitly identifies Atlas 2018-2023 and Atlas Cross Sport 2020-2023, V6 3.6L. Current primary headline names Atlas; the manual supplies direct Cross Sport proof. Exact selected dry retailer indexed tables support nine missing named groups and five existing range extensions shown below. All original coverage, including Comfortline and Trendline 2020, is preserved. Later Canadian Execline/Highline rows seen in another exact retailer listing remain outside this verified expansion pending configuration reconciliation. No 2.0L or 2024-up engine inference is made.

Years Make Model Named trim; actual engine and hood requirements apply
2018 Volkswagen Atlas Launch Edition
2018-2020 Volkswagen Atlas S
2018-2023 Volkswagen Atlas SE
2018-2023 Volkswagen Atlas SEL
2018-2021 Volkswagen Atlas SEL Premium
2020 Volkswagen Atlas Cross Sport Comfortline
2020 Volkswagen Atlas Cross Sport S
2020-2023 Volkswagen Atlas Cross Sport SE
2020-2023 Volkswagen Atlas Cross Sport SEL
2020-2021 Volkswagen Atlas Cross Sport SEL Premium
2020 Volkswagen Atlas Cross Sport Trendline
2019-2022 Volkswagen Atlas SEL R-Line
2019 Volkswagen Atlas SE R-Line
2021-2023 Volkswagen Atlas SEL Premium R-Line
2023 Volkswagen Atlas SEL R-Line Black
2020-2022 Volkswagen Atlas Cross Sport SEL R-Line
2020-2023 Volkswagen Atlas Cross Sport SEL Premium R-Line
2020 Volkswagen Atlas Cross Sport Execline
2020-2021 Volkswagen Atlas Cross Sport SE R-Line
2023 Volkswagen Atlas Cross Sport SEL R-Line Black

Verify 51-46405 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.

Specifications

Brand aFe POWER
Manufacturer Part Number 51-46405
Product line Momentum ST; current selected product and manual
Selected filter One 21-91108 Pro DRY S; three oil-free synthetic layers
Filter dimensions 4-inch flange, 6-inch base, 5.5-inch inverted top, 7.5-inch height
Tube sections 05-46405B1 and 05-46405B2; molded
Housing 05-46405B3; black cross-linked polyethylene per primary
Coupling 05-01480 silicone bellows
Loose supplied clamps Two size 048 and one size 056
MAF interface Original cartridge and original two T25 screws transfer; sensor aligns with flat flange
Measured airflow Pro DRY S 465 versus original 385 CFM at 7 inches H2O; oiled 480 is separate
Dyno qualification Selected dry report marks +7.30 hp / +6.41 lb-ft at 6000 rpm versus maxima +4.08 hp / +1.41 lb-ft
Emissions Current manufacturer/manual: not CARB exempt; California restriction
UPC 802959544570
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.

What's Included

Quantity Manufacturer service part Component
1 21-91108 Selected Pro DRY S oil-free filter
1 05-46405B1 Tube 1 of 2
1 05-46405B2 Tube 2 of 2
1 05-46405B3 Housing
1 05-01480 Silicone bellows coupling
2 03-50007 Size 048 clamps
1 03-50009 Size 056 clamp
1 05-01482 Auxiliary airbox opening plug

The alternate oiled filter in the shared bill is not supplied as a second selected filter. Original MAF cartridge and sensor, its two screws, three housing grommets, scoop, rubber trim and scoop hardware are retained. No new MAF cartridge or screws are itemized. Selected current primary and replacement-filter dimensions specify a 7.5-inch inverted-top filter; older retailer 8-inch wording is a source/revision conflict. The flowchart heading says Momentum GT while selected primary and manual identify Momentum ST; chart measurements retain that naming qualification.

About aFe Power

aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.

Related Parts

Frequently Asked Questions

What is the 51-46405?

One 21-91108 Pro DRY S oil-free filter with three synthetic layers, 4-inch flange and 7.5-inch height.

Is a MAF cartridge included?

No. Transfer the original cartridge, sensor and both original T25 screws.

How does the cartridge align?

Align the sensor with the shorter tube flat flange and seat the cartridge flush against the longer tube lip.

Which original mounts and duct parts remain?

Three original housing grommets, original scoop, its screws and transferred rubber trim remain.

Why keep the key outside and wait?

The exact manual directs keeping the key outside and waiting five minutes after opening the hood for computer shutdown.

Does the auxiliary plug change the inlet?

The plug closes the additional housing inlet. The manual associates an open inlet with more flow and the plug with lower noise.

Does the 7 hp / 6 lb-ft claim describe peak-to-peak differences?

The selected dry chart marks 7.30 hp and 6.41 lb-ft at 6000 rpm; run-max differences are 4.08 hp and 1.41 lb-ft.

What torque and recheck apply?

No numeric torque is specified. Secure all clamps, MAF plug, screws and mounts, then recheck after 100-200 miles.

Installation Instructions

Verify aFe 51-46405. Read all twenty pages and figures A-N. Keep key outside vehicle; open hood and wait five minutes for computer shutdown. Observe the manual negative-battery warning and work on a cool engine. Release MAF connector tab. Remove two original scoop screws with T25, push scoop toward engine then lift. Transfer rubber trim from old airbox to scoop. Loosen both original tube clamps and remove tube. Lift rear housing mount first, then release the other two mounts. Remove original MAF cartridge and its two T25 screws. Insert cartridge into shorter supplied tube, align sensor with flat flange and reuse both screws. Transfer all three grommets to supplied housing and seat housing. Fit selected filter; optional plug closes auxiliary opening for lower noise, while manual associates open inlet with more airflow. Restore original scoop with its hardware. Fit bellows and first 048 clamp at throttle body and secure. Insert longer tube with second 048 clamp tight enough to allow alignment rotation without pulling out. Fit 056 clamp at its opposite end. Insert shorter tube with attached MAF cartridge into filter, then connect cartridge to longer tube. Adjust until cartridge sits flush against tube lip, secure 056 and all remaining clamps, reconnect MAF plug and lock tab. Verify all connections, mounts, screws and clearance; restore battery connection if disconnected. No numeric clamp torque is specified. Recheck after 100-200 miles.

Important Disclosures

Actual linked chart gives selected Pro DRY S 465 CFM, oiled 480 CFM and original 385 CFM at 7 inches H2O. Selected dry difference is about 20.8 percent, rounded to 21. The GT chart heading differs from selected ST naming. Actual selected dry 2018 Atlas 3.6L dyno identifies PDS Final Run and marks 235.57 versus 228.27 hp and 206.20 versus 199.79 lb-ft at 6000 rpm: 7.30 hp and 6.41 lb-ft. Run maxima are 235.63 versus 231.55 hp and 238.72 versus 237.31 lb-ft, differences 4.08 hp and 1.41 lb-ft. Both June 15, 2018 runs use SAE 1.03, fourth gear and silver fan; selected dry run precedes baseline by approximately twenty-four minutes and weather differs. Point gains are not peak-to-peak gains or guaranteed results for every trim. Current manufacturer and exact manual state not CARB exempt, unavailable for purchase in California or use on California-registered vehicles. No EO exemption is established.

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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