aFe 54-20442 is a Magnum FORCE Stage-2 intake for qualified BMW E46 M52/M54 six-cylinder applications. It combines one pre-oiled Pro 5R conical filter, a roto-molded tube and a powder-coated heat shield that captures the original front air duct. The original MAF assembly is reused; the supplied adapter is for the 2.5L/2.8L arrangement, while the manual connects the 3.0L MAF directly.
Current manufacturer headline specifies E46 1999-2006 with M52/M54 2.5L, 2.8L or 3.0L engines. The original selected rows below remain unchanged. Existing 1998 323i/328i rows have exact-part retailer positives, but precede the manufacturer headline/manual start; treat them as a source conflict requiring chassis and housing confirmation, not proof of physical incompatibility. The manual lists 325i/330i through 2006, while original sedan rows end in 2005; no later sedan extension is certified here. Exact-part specialist listings exclude M56 SULEV engines despite a conflicting general-retailer positive. Do not infer M56, E36, 320i 2.2L or M3 compatibility from a broad retailer family table.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2000 | BMW | 323Ci | Base |
| 1998-2000 | BMW | 323i | Base |
| 2001-2006 | BMW | 325Ci | Base |
| 2001-2005 | BMW | 325i | Base |
| 2001-2005 | BMW | 325xi | Base |
| 2000 | BMW | 328Ci | Base |
| 1998-2000 | BMW | 328i | Base |
| 2001-2006 | BMW | 330Ci | Base |
| 2001-2005 | BMW | 330i | Base |
| 2001-2005 | BMW | 330xi | Base |
Verify 54-20442 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
| Brand | aFe POWER |
| Manufacturer Part Number | 54-20442 |
| System | Magnum FORCE Stage-2; selected Pro 5R oiled media |
| Filter service part | 24-45505; one filter, 4.5-inch flange, 6-inch base, 4.75-inch top, 5-inch height |
| Tube | Roto-molded intake tube; not a metal tube |
| Housing | One-piece powder-coated heat shield; current primary does not establish a numeric metal gauge |
| MAF interface | Original assembly retained; adapter for 2.5L/2.8L, direct clamp for 3.0L |
| Emissions | Manufacturer references D-550-38 for some or all listed applications; exact application/exclusion verification remains required |
| Maintenance | Clean and re-oil the Pro 5R filter with its appropriate service procedure; no fixed cleaning mileage established here |
| Post-install check | Retighten connections after approximately 100-200 miles; manual supplies no numeric fastener or clamp torque |
| UPC | 802959503867 |
| 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 | 24-45505 | Blue Pro 5R oiled filter; gray Pro DRY S shown in shared manual is the alternative kit media, not a second supplied filter |
| 1 | 05-20442B1 | Molded intake tube |
| 1 | 05-20442B3 | Heat-shield housing |
| 1 | 05-50442 | MAF coupling, only for 2.5L/2.8L |
| 2 | 03-50057 | M6 screws; length not specified in this bill |
| 2 | 03-50070 | Washers |
| 21.3 inches | 05-00072 | 7/16-inch seal trim |
| 8.5 inches | 05-00149 | 1/16-inch seal trim |
| 10.5 inches | 05-00149 | 1/16-inch seal trim |
| 1 | 03-50002 | Size 060 clamp |
The filter flange has its own illustrated clamp in addition to the separately itemized size 060 connection clamp. Reuse the original MAF, front duct and the original mounting bolt specified by the procedure. The manual shows alternative media side by side, not two filters supplied with this selection. Neither a new MAF sensor nor a separate closed airbox lid is itemized.
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
A vehicle-specific Stage-2 system using one oiled conical filter, a molded tube and a heat shield. It retains the original MAF and front air duct.
Are both filters in the shared manual supplied?No. The selected Pro 5R kit uses one blue 24-45505 oiled filter. The gray Pro DRY S is the alternative kit selection.
Does every engine use the same MAF adapter?No. Insert the supplied coupling for the specified 2.5L/2.8L engines. The 3.0L installation clamps directly over the original MAF assembly.
How does the housing attach to the original duct?Align the bottom housing clip with the vehicle, capture the front plastic duct with the housing clip and reuse the specified original bolt at the inner fender.
Can the 1998 or M56 retailer rows be treated as manufacturer approval?No. Exact-part retailer positives conflict with manufacturer year/chassis or engine limits. Confirm the actual chassis, engine and airbox before ordering; these conflicts remain qualified.
Are the advertised power gains guaranteed?No. The manufacturer advertises up to 6 HP and 12 lb-ft but supplies no linked test chart on the current exact page. Vehicle, conditions and calibration-specific results are unverified here.
Does the EO number cover every listed vehicle?The manufacturer says some or all applications are exempt under D-550-38. Confirm the exact covered application and exclusions; the full order could not be verified in this pass.
When should installation connections be checked?The manual specifies approximately 100-200 miles. It gives no numeric clamp or screw torque and no fixed filter-cleaning mileage.
Verify aFe 54-20442. Read the complete illustrated manual and work only on a cool engine. Disconnect the negative battery terminal as instructed. Release the four upper airbox clips, loosen the MAF clamp, unplug its harness and remove the cover/MAF assembly. Remove the original filter and two housing bolts; release the rear electrical-cable rubber clip and lift/tilt the lower housing while removing the scoop. Insert the new tube sideways into the shield and rotate it into position, then secure with the supplied M6 screws and washers. Install the selected filter and clamp. Position the trim notch at the shield's 90-degree corner and the small edge seal as illustrated. Fit the 2.5L/2.8L MAF adapter only where required; use the direct MAF connection for 3.0L. Install the MAF on the assembly before lowering it into the car, leaving the connection loose until aligned. Seat the bottom clip, capture the original front duct, secure the housing with the specified original mounting bolt, tighten connections and reconnect the MAF harness. Restore the battery connection after assembly. Retighten connections after approximately 100-200 miles. The manual instructs placement of the EO identification label on a smooth clean surface on or near the device for an applicable exempt installation; a label alone does not establish vehicle coverage. No numeric torque is supplied.
Manufacturer exact specifications and the full 12-page illustrated manual were reviewed, including all bill-of-material items and Figures A-F. Current primary links no flow or dyno sheet; power and airflow test verification remains open. Full D-550-38 application/exclusion review remains held after the earlier access challenge, without retry or bypass. Original fitment rows, year bounds, gaps, emissions metadata, native memberships and media assets are preserved. Turn14 exact-product information remains unavailable without authenticated access. No price change or delivery-price claim is made.
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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