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Old 04-20-2012, 02:24 PM   #1
B-rad
 
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filter on top of air box

wondering if removing the factory built in air filter on the top of air box will help my milage or possibly hurt the engine?
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Old 04-20-2012, 02:30 PM   #2
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Slight improvement to f/e.

However, that upper filter is a CARB requirement. Being in Cali, I'm not sure you'd pass inspection with it removed. From what I understand, inspection is a pretty anal issue down there.
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Old 04-22-2012, 10:28 AM   #3
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Do you mean the filter that is behind the passenger side bottom glove box?
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Old 04-22-2012, 10:51 AM   #4
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No. In the air intake there are two filters. A white fiber filter that sits on the lower portion of the air box, and a permanently affixed black charcoal filter attached to the upper part. He is talking about the charcoal filter.
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Old 04-22-2012, 12:31 PM   #5
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So if you remove the carbon filter you get better mileage?
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Old 04-22-2012, 01:30 PM   #6
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yes the black carbon filter, its looks like its quite air restrictive.
iam wondering how the smog police would know i removed it and if the engine would still run properly?
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Old 04-22-2012, 03:53 PM   #7
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I'm guessing it's just to hold in fuel vapors after the engine shuts down. Mabye without it there would be a gas smell....
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Old 04-26-2012, 01:47 PM   #8
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I pulled mine out of my Xa, big improvement in flow. Very noticable at the top of the rpm range. I broke it pulling it, you can dremel it out carefully and be able to put it back. It blocks noise as well, so now there is more of a growl out of the front. No gas fumes noticed. Not sure on MPG. I know it did not go down.
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Old 04-26-2012, 02:13 PM   #9
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pulled mine out also.. mine was easily pulled off.. no damage.
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Old 04-26-2012, 04:47 PM   #10
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Quote:
Originally Posted by B-rad View Post
yes the black carbon filter, its looks like its quite air restrictive.
iam wondering how the smog police would know i removed it and if the engine would still run properly?
The Obama EPA will crucify you for that. You have admitted publicly to defiling a clean air system. You will be punished for your sin!
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