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aFe Magnum FORCE Stage-2 intake details
aFe 54-31662 Magnum FORCE Stage-2 intake uses one Pro 5R oiled filter, replacement tube and silicone hump coupling inside the retained original airbox on qualified BMW M3 E9X 2008-2013 4.0L S65 applications. The original lid is restored, and tube groove must seat against both box and lid. Original flexible breather reconnects through the supplied aluminum fitting.
Key Features
- One 24-90061 Pro 5R oiled filter, five cotton-gauze layers and 5.5-inch height.
- One 05-31662B1 tube and one 05-01262 silicone hump coupling.
- Two size 104 coupling clamps, aluminum fitting 05-01096 and rubber grommet 03-50139.
- Original airbox, lid, lid screws and flexible breather tube are retained.
- Correct assembly puts selected filter below the original air-filter plunger and seats tube groove at box and lid.
Fitment
Current primary and own exact eight-page manual identify BMW M3 E9X 2008-2013 with the 4.0L S65 V8. The original Base 2008-2013 row is preserved and old 2008-2012 title is corrected. Confirm actual E90/E92/E93 body and original housing arrangement; the family endpoint is not a claim that every body was produced every year. Special editions, larger-displacement versions, later turbocharged M3 models and other engines are not inferred. No new named application group or year range is added.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2008-2013 | BMW | M3 | Base |
Verify 54-31662 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
Specifications
| Brand | aFe POWER |
| Manufacturer Part Number | 54-31662 |
| Product line | Magnum FORCE Stage-2 |
| Selected filter | One 24-90061 Pro 5R oiled filter; five cotton-gauze layers |
| Filter dimensions | Oval 7 x 3-inch flange, 5.5-inch height; current replacement listing |
| Tube | 05-31662B1 |
| Coupling | 05-01262 silicone hump |
| Loose coupling clamps | Two size 104, service part 03-50051 |
| Auxiliary fitting | 05-01096 aluminum smog-pump adapter; procedure reconnects original flexible breather |
| Grommet | 03-50139 rubber |
| Original housing interface | Filter below original plunger; tube groove seats against airbox and lid |
| Measured dyno maxima | 297 versus 288 hp; 231 versus 224 lb-ft; differences 9 hp / 7 lb-ft |
| Flow qualification | 41% manufacturer claim; no current linked airflow chart reviewed |
| Emissions qualification | Primary references D-550-38 for some/all applications; full exact scope remains held |
| UPC | 802959503331 |
| 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 | 24-90061 | Selected Pro 5R oiled filter |
| 1 | 05-31662B1 | Replacement intake tube |
| 2 | 03-50051 | Size 104 coupling clamps |
| 1 | 05-01262 | Silicone hump coupling |
| 1 | 05-01096 | Aluminum fitting, bill label smog pump |
| 1 | 03-50139 | Rubber grommet |
Alternate dry media in the shared bill is not an additional selected filter. The filter band clamp is supplied with the filter and shown in the procedure; it is separate from the two loose size 104 coupling clamps. No new airbox, lid, sensor, lid screws or flexible breather is itemized. Original airbox and lid are required to complete the enclosure. The supplied fitting is called smog pump in the bill, and the procedure reconnects the existing flexible breather to it; no emissions hose deletion or alternate routing is authorized. Shared illustrations use dry media; the selected filter remains oiled.
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
- Manufacturer product specifications for 54-31662
- Exact illustrated installation manual
- Manufacturer-linked dyno comparison and run configuration
- Shop the complete aFe Power collection
Frequently Asked Questions
Which filter is supplied for 54-31662?One 24-90061 Pro 5R oiled filter, five cotton-gauze layers, oval 7 x 3-inch flange and 5.5-inch height.
Are the original airbox and lid retained?Yes. The original box, lid, screws and air-filter plunger interface remain part of the installation.
Which end seats first?Seat the hump coupling on the intake plenum first, then guide the filter end into the airbox.
Where should the filter sit?Below the original air-filter plunger, with tube groove seated against airbox and lid.
What reconnects to the aluminum fitting?The original flexible breather tube, as directed. The bill calls the fitting a smog-pump adapter; no hose deletion is specified.
How many loose coupling clamps are itemized?Two size 104 clamps; the filter has its own supplied band clamp.
Are 12 hp and 9 lb-ft the actual run-max differences?The reviewed sheet run maxima differ by 9 hp and 7 lb-ft. It does not mark exact advertised 12 hp / 9 lb-ft comparison points.
What torque and recheck are specified?No numeric torque or mileage interval is given. Verify plenum coupling, breather, tube groove, filter position and restored lid.
Installation Instructions
Verify aFe 54-31662. Read all eight pages and figures A-D. Work cool and disconnect negative battery as directed. Loosen original airbox-cover screws with T25 and remove lid. Loosen tube-to-plenum clamp and disconnect original flexible breather from original tube. Remove original tube and filter. Assemble selected filter, its band clamp, supplied rubber grommet and aluminum fitting on replacement tube; secure filter clamp. Fit hump coupling and two supplied clamps loosely. Seat hump coupling on intake plenum FIRST, then guide filter end into original airbox. Verify filter sits BELOW original air-filter plunger and tube groove seats against airbox and lid. Secure hump-coupling clamps. Reconnect original flexible breather to aluminum adapter, restore original lid and secure original retaining screws. Restore battery connection and verify all joints and clearances. Exact manual supplies no numeric torque or mileage recheck interval. Apply supplied EO identification label only after confirming exact vehicle/configuration eligibility; label presence alone is not full exemption proof.
Important Disclosures
Current primary advertises 12 hp, 9 lb-ft and 41% more flow. No current linked airflow chart establishes flow baseline or pressure. Actual linked Mustang-dyno sheet lists intake maxima 297 hp and 231 lb-ft versus baseline 288 hp and 224 lb-ft, differences 9 hp and 7 lb-ft. The chart does not mark exact 12 hp / 9 lb-ft comparison points, so those advertised gains are not represented as measured run-max differences. Report printed August 31, 2010; intake acquired August 31 at 09:23 and baseline August 20 at 14:59. Both notes mention aFe exhaust; baseline explicitly mentions third gear, while other run notes are cropped. Complete identical test conditions and selected media are not independently established by the cropped labels. Primary references D-550-38 for some/all applications. Prior official challenge remains stopped; the full exact EO application/exclusion proof is held, so historical metadata is preserved without blanket certification. Turn14 authenticated access is unavailable and prices remain unchanged.
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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