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1997-2001 Prelude AEM Cold-Air installation

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Remove the front bolt holding the factory air box Remove the rear bolt holding the factory air box Squeeze rubber intake hose and pull from air box Carefully remove air box, make note of vacuum line attached to box, disconnect from clips on box 
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This is the vacuum line for the dual stage air  intake runner... It leads to a vacuum reservoir with an electrical solenoid attached to it - disconnect this line. You will see that there is another line attached to the reservoir and runs to the intake manifold - disconnect this line at the intake manifold, put vacuum cap on intake manifold port Unbolt and Remove the reservoir and bracket, it should now look like this On the passenger side fender, remove the lens and remove the bolt behind the lens
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Remove the bolt and panel clip from the fender well area From underneath, remove the bolts and panel clips Pull the plastic section loose from the inner side of the car first and then pull the fender panel back  Remove the front bolt from the lower portion of the resonator box Remove the rear bolt from the lower portion of the resonator box
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Remove the resonator box, feed the vacuum line from the reservoir through while removing You should be here by now. This is where the factory intake went through. We will need to enlarge this. You can use an air saw, air nibbler, or tin snips to do this Touch up the area you cut with some color-match touch up paint. You can slit some vacuum hose to go around the hole for protection and decoration Remove the "horseshoe" from the engine. Remove the one side that goes to  the valve cover, the other was remove when we pulled out the intake.
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 Follow coolant lines 1 and 2 back to where they connect to the engine and throttle body - disconnect    Use small diameter coolant hose to connect the ends together. Put pipe in car and select a suitable location for the bypass valve, mark the spot where you will be cutting Use template provided and tape in place. Use a suitable cutting device (hacksaw) to cut pipe - Deburr the cut and wipe out intake making sure there are no metal particles in intake Install rubber isolator then install bypass valve and piping. Do not tighten until all clearances are checked. Note: isolator should not be under any tension. Slightly bend mounting tab on intake if needed.
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Check to make sure pipe is centered in hole. If pipe has good clearance then tighten clamps.  Connect large hose between valve cover and intake Remove solenoid from resevoir and plug vacuum ports. Reconnect solenoid to factory wiring harness, zip tie out of the way. It should now look like this.
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Install filter onto intake pipe, check for clearance around filter,  tighten clamp Reassemble fender liner and plastic panel. Verify all connections then start engine and check for coolant leaks (top off if necessary

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Last Updated: 4.3.2008
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