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i been running my AEM intake for about 2yrs. now that i think about it, did it help or made my car slower on acceleration? i kinda forgot the feeling of a stock IS300 so i want to ask, does your car feel sluggish around 500-2500rmp (refering to auto owners)? to bad i crack my stock intake so i cant switch back. also does any other aftermarket intake owners feel sluggish too?
 

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I think it just depends on the weather, cold hot etc.... I notice that and I have my stock intake on. I took my AEM off because I didn't like the sound it made....
 

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I guess u're one of the lucky ones to have an AEM intake with no CEL. I have a 5 speed, from what I remember, the IS300 is never sluggish throughout the whole RPM range.
 

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open filter intake makes the car slower on acceleration... well at least from my POV w/ the K&N. but up top where u need more air flow for power, its there! ;] if your down for off the line power id say get Joe-z/PLP tube... for higher end (highway stuff) open filter .
 
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