Installation Manual

ManualsBrandsAEM ManualsAutomotiveAEM 21-478WR Wrinkle Red Cold Air Intake System

Equipped with AEM

Dryow™ Filter

No Oil Required!

INSTALLATION INSTRUCTIONS

PART NUMBER: 21-478

AEM Induction Systems 1 (800) 992-3000 WWW: http://www.aemintakes.com

2011-2014 SUBARU WRX STI H4-2.5L Turbo

2008-2010 SUBARU WRX STI H4-2.5L Turbo C.A.R.B. E.O. # D-670-6

2011-2014 SUBARU WRX H4-2.5L Turbo

2008-2010 SUBARU WRX H4-2.5L Turbo C.A.R.B. E.O. # D-670-6

SOME INTAKE SYSTEMS ARE NOT LEGAL FOR

SALE OR USE ON ANY POLLUTION CONTROLLED

MOTOR VEHICLE IN CALIFORNIA OR STATES

ADOPTING CALIFORNIA EMISSION PROCEDURES.

See aemintakes.com for CARB status on each part for a specific vehicle

Summary of content (8 pages)

PAGE 1
Equipped with AEM® Dryflow™ Filter No Oil Required! INSTALLATION INSTRUCTIONS 2011-2014 2008-2010 2011-2014 2008-2010 PART NUMBER: 21-478 SUBARU SUBARU SUBARU SUBARU WRX STI WRX STI WRX WRX H4-2.5L Turbo H4-2.5L Turbo H4-2.5L Turbo H4-2.5L Turbo C.A.R.B. E.O. # D-670-6 C.A.R.B. E.O. # D-670-6 SOME INTAKE SYSTEMS ARE NOT LEGAL FOR SALE OR USE ON ANY POLLUTION CONTROLLED MOTOR VEHICLE IN CALIFORNIA OR STATES ADOPTING CALIFORNIA EMISSION PROCEDURES. See aemintakes.
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PARTS LIST Description Qty. Part Number A Air Filter Assy 2.75 X 9” Dry Ele. 1 21-2029DK B Inlet Pipe 1 2-478 C Heat Shield 1 20-478 D Hose, Silicone 2.75x3” Blk. 1 5-275 E Edge Trim, 13” 1 8-4013 F Edge Trim, 15.5” 1 8-4155 G Mount, Rubber 1” X 6mm 1 1228599 H Zip Tie, 8” Tree Push-Mnt. 1 1-127 I Rubber Edge Trim 11.5” 1 102466 J Bolt, Btn. Hd. M4-0.
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Read and understand these instructions BEFORE attempting to install this product. Failure to follow installation instructions and not using the provided hardware may damage the intake tube, throttle body and engine. The AEM® intake system is a performance product that can be used safely during mild weather conditions. During harsh and inclement weather conditions, you must return your vehicle to stock OEM air box and intake tract configuration. Failure to follow these instructions will void your warranty.
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e. Unplug the MAF sensor wire harness. f. Remove the MAF sensor from the air box by removing the two screws. Set the MAF sensor aside in a safe area for later use. g. Loosen the hose clamp securing the factory air box inlet to the compressor inlet tube. h. Unclip the air box clips and remove the rear half of the factory air box assembly. i. Remove the remaining half of the factory air box. j. Remove the headlight access cover by twisting it counter clockwise. Save the cover for later use.
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3. Installation of AEM® intake system. a. When installing the intake system, do not completely tighten the hose clamps or mounting hardware until instructed to do so. b. Install the rubber edge trim on the heat shield as shown. c. Install the edge trim on the heat shield as shown. d. Install a M6 rubber mount onto the heat shield, secure with supplied M6 nut. e. Insert the MAF sensor into the AEM® intake pipe with the supplied M4 screws. f.
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h. Orient the hose clamp as shown in the picture, then tighten. i. Install the silicone coupler and two #44 hose clamps onto the intake pipe. Orient the hose clamps as shown but do not completely tighten. j. Carefully maneuver the AEM® intake pipe assembly into position. Ensure the slotted bracket on the intake pipe is seated on the rubber mount stud. k. Slide the silicone coupler onto the compressor inlet pipe. Orient the hose clamps on the compressor inlet as shown and tighten securely. l.
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n. Align the intake pipe so it is centered within the heat shield’s inlet hole. Tighten the M6 nut to secure the rubber mount assembly. o. Hold the intake pipe in position and tighten the final hose clamp on the silicone coupler. p. Replace the headlight access cover that was removed in step 2j. q. Route the MAF sensor wiring harness under the intake pipe and then secure to the MAF sensor. Secure the MAF sensor wiring to the intake pipe’s bracket with the tree-mount zip tie.
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4. Reassemble Vehicle a. Position the inlet pipes for the best fitment. Be sure that the pipes or any other components do not contact any part of the vehicle. Tighten the rubber mount (if applicable), all bolts, and hose clamps. b. Check for proper hood clearance. Re-adjust pipes if necessary and re-tighten them. c. Inspect the engine bay for any loose tools and check that all fasteners that were moved or removed are properly tightened. d. Reconnect negative battery terminal and start engine.