aFe 51-12452 is the Rapid Induction oil-free intake for qualified MINI Cooper S N18 applications. Current primary separates R56 2011-2013 and R57 2011-2015, and expressly excludes Clubman. A top-mounted 18-gauge steel shield and replacement tube retain the original lower airbox and MAF; the filter locks into the shield with its molded bump stops.
Current exact primary identifies Cooper S R56 2011-2013 and R57 2011-2015 with N18 1.6L turbo, while its overview and older manual use a 2011-2014 family heading. Retain original Cooper S 2011-2015 row with actual R56/R57 and N18 requirements; it is not a blanket claim for a 2014-2015 F-series 2.0L car. The exact primary expressly excludes Clubman. Coupe/Roadster and other broader indexed retailer positives require exact housing and chassis confirmation before new selections. No N14, Countryman, Paceman, JCW or later-engine application is inferred.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2011-2015 | Mini | Cooper | S |
Verify 51-12452 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
| Brand | aFe POWER |
| Manufacturer Part Number | 51-12452 |
| Current product line | Rapid Induction; earlier Stage-2 manual naming |
| Selected filter | One 21-90072 Pro DRY S; three oil-free synthetic layers |
| Filter dimensions | 3.5-inch flange; 5-inch base; 3.5-inch top; 8-inch height |
| Tube | 05-12452B1; original MAF interface without separate coupling |
| Upper housing | 05-12452B2; 18-gauge steel per exact primary, under original hood-scoop location |
| Trim | One 4.75-inch and one 15-inch length; both service stock 05-00072 |
| Original components | Lower airbox, MAF assembly and two MAF screws retained |
| Line fixing | 03-50377 fixing clamp; supplied hex screw, wavy washer and nut; sizes/length not stated |
| Filter service | Loosen tube and remove housing for filter cleaning |
| Recheck | Clamps and screws after exactly 200 miles; no numeric torque |
| Exclusion | Does not fit Clubman per exact manufacturer note |
| Performance qualification | 49-percent flow without linked flowchart; linked dyno explicitly P5R oiled, not selected dry |
| Emissions | Current manufacturer not CARB exempt; unavailable for California purchase or California-registered vehicles |
| UPC | 802959513262 |
| 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 | 21-90072 | Selected Pro DRY S filter |
| 1 | 05-12452B2 | Upper housing |
| 1 | 05-12452B1 | Intake tube |
| 1 | 05-00072 | Trim seal 4.75-inch length |
| 1 | 05-00072 | Trim seal 15-inch length |
| 1 | 03-50019 | Size 044 clamp |
| 1 | 03-50377 | Vacuum-line fixing clamp |
| 1 | 03-50057 | Hex screw; size/length not given |
| 1 | 03-50058 | Wavy washer |
| 1 | 03-50059 | Hex nut |
One selected dry filter is supplied; alternate oiled media and suggested cleaners/pre-filter are separate. The exact bill supplies two trim lengths and no separate top cover or M6 cover screws. No cover from the related Countryman kit is included. Original lower housing, MAF assembly and two original screws are reused. No new MAF, wiring, complete lower airbox or separate coupling is itemized. The bump-lock flange retains the filter in the shield; this does not remove the need to secure tube connections.
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 21-90072 Pro DRY S filter with three oil-free synthetic layers, 8-inch height and 3.5-inch flange.
Does this fit Clubman?The exact manufacturer note expressly excludes Clubman. Confirm actual R56/R57 N18 chassis and original housing.
How does original 2011-2015 model coverage apply?Current primary separates R56 Cooper S 2011-2013 and R57 Cooper S 2011-2015. It does not establish a later F-series 2.0L application.
Are a top cover and cover screws included?No. The exact bill has two trim seals and no separate top cover; do not substitute the Countryman bill.
How is the filter retained?Push its bump-lock flange fully through shield opening, then install tube filter-side first and secure connections.
Which original parts remain?The lower airbox, MAF assembly and its two screws remain. The supplied fixing clamp secures the original vacuum line.
Does the dyno independently test selected dry media?No. It explicitly identifies P5R oiled media with different run dates, weather and SAE correction factors.
What final check and cleaning access are required?Recheck clamps and screws after exactly 200 miles. Loosen tube and remove housing for cleaning access; no numeric torque is supplied.
Verify aFe 51-12452. Read all sixteen pages and figures A-G. Work cool and disconnect negative battery. Remove three original top-housing screws; retain two original MAF screws and unclip harness from housing side. Remove original upper housing and filter. Fit both supplied trim lengths along new shield edges. Push selected filter through shield opening until its bump stops pass fully through. Place assembly on original lower box and secure using two original MAF screws, without overtightening. Fit tube FILTER end FIRST, then carefully onto original MAF assembly. Secure filter and MAF tube joints with the provided clamp arrangement. Fit supplied vacuum-line clamp at the upper-right MAF mounting hole with its hardware and check routing, harness and hood clearance. Restore battery connection and confirm all joints. Recheck clamps and screws after exactly 200 miles. No numeric torque is provided. For cleaning, loosen tube and remove housing to access filter. No separate top-cover installation is specified in this exact manual.
Current exact primary advertises 49-percent airflow increase, 18 hp and 20 lb-ft, without a linked airflow chart. Actual linked dyno is a 2012 Cooper S and explicitly labels intake aFe AIS(P5R), not selected dry media. Marked power points 172.58 versus 154.75 hp differ by 17.83 hp; torque points 188.00 versus 168.58 lb-ft differ by 19.42 lb-ft. Run maxima differ by 8.08 hp and 14.73 lb-ft. April 2, 2013 baseline uses SAE 1.01 at 66.44 F, 29.11 inHg and 50-percent humidity; July 25 intake uses SAE 1.04 at 85.15 F, 29.04 inHg and 40-percent humidity. Both notes name fourth gear, while intake explicitly names original exhaust. Dates, conditions, correction factors and vehicle/media scope differ. These figures remain qualified historical evidence. Current non-CARB restriction supersedes reliance on older manual race wording; it is not blanket California permission. Current R56/R57 chassis-specific bounds qualify the older generic 2011-2014 manual and original 2011-2015 model row. The primary Clubman exclusion is explicit. Broader exact retailer positives remain source holds without declaring physical incompatibility from headline absence.
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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