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Message: <blockquote data-quote="defcon1" data-source="post: 1370491" data-attributes="member: 30064">Hey Ong... :)I think you are confusing the installation of a mushroom type air filter with CAI.A lot of people install an aftermarket air filter INSIDE the engine bay. And it is actually much more efficient than the stock air filter setup, despite the heat. This is because, it greatly reduces the resistance to air flowing into the engine I.e. the engine breathes easier. Also, when the car is moving, the air-flow into the engine bay through the grills tends to take most of the heat out of the engine bay. Air running through the radiator may be a few degrees higher temp than ambient, but the increased air-flow efficiency more than makes up for this.A true CAI has to have the air filter in a position to draw in cold air. This would mean piping the air tract to somewhere cool. In the Cefiro, the best place for this would be to place the air filter inside the bumper, just behind the spotlight. If you remove the stock resonator that sits there, there is more than enough space. Unfortunately, in a country like Malaysia...you could be caught in a flash flood at any time and that position would be of marginal risk. Still, the water would have to be a foot high before it becomes a real problem.Another option would be to have the filter inside the engine bay, then installing a small scoop on the bonnet of the car. he air filter would sit in a shielded box with the scoop forming the top of the box. The upper edges of the box sides would be lined with rubber to seal against the bonnet. Of course, you'd have to cut a hole so that cold air could reach the air filter...something most of us would not be keen to do.A heat shield protecting the air filter is not to prevent hot air from reaching it. It is simply to prevent radiated heat from reaching it as most of these filters eg. Apexi, Razo, K & N etc. are made predominantly of fine stainless steel mesh that would pick up radiated heat.All in all, throwing away the stock scoop and placing an air filter in a position behind the battery will do wonders for your torque. In no way will it ever reach a temperature where it could actually damage your engine or even reduce it's efficiency.I once experimented with a CAI on my Celica. Now, the Celica GT4 is a true sports car, so it sits quite low. I piped the air filter all the way behind the bumper...and it sat about 6" above the ground. My friends nick-named my car "The Most Powerful Vacuum Cleaner in Singapore"!!!... <img src="https://zerotohundred.com/forums/styles/default/xenforo/smilies/laugh.gif"  class="smilie" loading="lazy" alt=":laugh:" title="Laugh    :laugh:" data-shortname=":laugh:" /></blockquote>

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