Installation Instructions for: Part Number 21-472 2002-2004 Subaru Impreza RS 2.5L 2003-2004 Subaru Impreza TS 2.5L 2003-2004 Subaru Outback Sport 2.5L.
The AEM Cold Air System is the result of extensive development on a wide variety of cars.
Each system is engineered for the particular application. The AEM Cold Air System differs from
all others in several ways. We take the inlet air from outside of the engine compartment where
the inlet air is considerably cooler than the hot under hood air. The cooler inlet air temperature
translates to more power during the combustion process because cool air is denser than warm
air. AEM has conducted extensive inlet air temperature studies and we have seen temperature
reductions of up to 50 degrees by pulling air from outside of the engine compartment. The air
mass flow to the engine is increased because of the increased airflow and reduced inlet
temperature, which translates to more power. The AEM Cold Air Systems come with complete
instructions for ease of installation.
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Designed to compliment Wilwood’s Subaru Impreza WRX front big brake kit, this new generation Rear Disc Brake Kit provides outstanding holding power with an uncluttered look that is easy to install*
Every Subaru Impreza WRX Pro Series rear brake kit gets the powerful clamping force from a pair of billet four-piston Dynalite calipers. Calipers come in black anodized finish with engraved Wilwood logo. The latest edition of the billet Dynalite features stainless steel anti-rattle plates for quiet running and longer wear in the caliper bridges.
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The completely redesigned Impreza arrives with a more rigid structure, a new body style, a refreshed interior, improved engines and more. Door windows now have a frame. In terms of size, the new edition gains 9.5 cm in the wheelbase and is 11.5 cm longer. The Impreza is available as a four-door sedan and a four-door hatchback sedan and in two trim levels, 2.5i and WRX.
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This B&M Precision Sport Shifter has been designed to work on most 1996-2003 Subaru Legacy & Impreza and 1996 and up Subaru Impreza WRX model vehicles. It has been engineered to greatly reduce shift throw and improve shifter feel. Check the parts and tools lists at the beginning of these instructions for the supplied parts and the tools required to install your B&M Precision Sport Shifter. Installation of this B&M Precision Sport Shifter can be accomplished by anyone with minimal mechanical experience.
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Installation Procedure the Hyper Direct Coil on Subaru Impreza:
1. Take off a terminal by a battery minus terminal, the order of the plus terminal, and please take off battery.
2. Please remove washer tank, air duct, air cleaner box.
3. Please take off 2 and the fourth coil. The fourth coil turns it, and please take it out in the upper part.
4. Please write a number to the coil harness coupler. A white coupler is 2, A black coupler is 4.
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This kit is designed for Subaru Impreza WRX chassis model GDB, engine EJ20/EF25, year 2002-2005. Please do not attempt to install this kit on other application.
Installation:
(1) Disconnect the blow by hose and remove
the blow by tube off from the intercooler.
(2) Disconnect the Air Bypass Valve hose and remove the valve.
(3) Disconnect the turbo outlet hose and throttle hose and remove the intercooler.
(4) Remove the left blow by hose. Cut the provided 12φ rubber hose to 650mm and install it using the provided three way fitting to the right blow by hose as shown.
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OVERVIEW: VEHICLE 1 Using a 10mm socket with ratchet, loosen the nut and remove the negative battery cable from the negative post of the battery. 2 Using a 10mm socket with ratchet, remove the grounding bolt from the inner fender. This grounding bolt is located on the drivers’ inner fender behind the battery as shown in Figure B. 3 Using a 10mm socket with ratchet, remove the two bolts holding the windshield washer reservoir. 4 Lift the reservoir out of its place and unplug the green washer pump connector from the washer pump at the bottom of the reservoir. 5 Locate and disconnect the two front wiring harness plugs (E2 and E3). The E2 and E3 plugs are located behind the battery box. 6 Read the rest of this entry »

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This manual is in no way definitive instructions on how to fit Gauges to an Impreza. It has merely been compiled as a guide to illustrate the parts I have used in order to fit them to my vehicle. It is designed as a source of reference only. Hope you find it useful !
For my new age Impreza I decided to fit a Turbo Gauge and Oil Pressure Gauge.
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The AEM Engine Management System (EMS) is the result of extensive development on a wide variety of vehicles. Each system is engineered for a particular application. The AEM EMS differs from all others in several ways. The EMS is a “stand-alone”, which completely replaces the factory ECU and features unique plug and play technology. There is no need to modify the factory wiring harness and in most cases the vehicle may be returned to stock in a matter of minutes. The AEMPro software is configured to work with the factory sensors and equipment, so there is no need for expensive or hard to find sensors, making replacements and repairs as simple as with any stock vehicle. For stock and slightly modified vehicles, the AEMPro software can be programmed with base parameters, providing a solid starting point for beginner tuning. For more heavily modified cars, the EMS has many spare inputs and outputs allowing the elimination of add-on rev-limiters, boost controllers, nitrous controllers, fuel computers, etc. It also includes a configurable onboard data logger capable of recording 512kb of information. Every EMS comes with all functions installed and activated, and there are no expensive options or upgrades to be performed.
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Congratulations on the purchase of the new AccessPORT handheld programmer. The AccessPORT can:
- Reprogram the factory engine control unit (ECU) with improved tuning parameters through the on-board diagnostic (OBD-II) port
- Monitor and log vehicle sensor data using on-screen digital gauges
- Read and clear engine diagnostic trouble codes (DTCs)
- Measure 0-60 mph and ¼ mile times
- Estimate instantaneous and average fuel economy
-Adjust idle and timing
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