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Old 27 Dec 2012, 12:39 am
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Default Will a cold air intake make a 2006 Honda Civic Si not pass Smog?

This is the specific one. Would also like to know if the gain this intake is supposed to give is wrong. Thanks
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Old 27 Dec 2012, 12:50 am
Sky Sky is offline
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The gain is straight up BS. It won't hurt you from passing smog, but just incase, keep your old CAI(yes the stock filter is actually a CAI) You will only see a increase of 2-4 horsepower on the high-end, and you will notice a powerLOSS on the low end. Now if you had headers/exhaust/ and a tune you would gain 15-20 horsepower. Remember you always need to tune after each mod, as the ECU won't read it right and you wont get the proper gains.
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Old 27 Dec 2012, 01:07 am
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cant the carb website for your state
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Old 27 Dec 2012, 01:21 am
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I doubt it can influence somehow.. front one point of view it gives more air into the engine. more air means one can burn more fuel. more burnt fuel - more exhaust.

maybe it can. but only at high revs. this test is taken at low revs, isn't it?

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Old 27 Dec 2012, 01:34 am
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It depends on your state. In California if the intake is not CARB approved for your vehicle it will not pass smog. In other states it can make smog testing iffy - the lack of preheat and the unexpected turbulence ahead of the throttle plate can be troublesome. Hondas are not as sensitive to the turbulence as Toyotas are.

It will reduce your fuel economy, especially for short trips in the winter, and will not produce noticeable increase in power. It will make your car noisier.
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Old 27 Dec 2012, 01:46 am
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Get rid of the aftermarket CAI. It will suck up water during heavy rain and cause the engine to hydro lock. Usually throwing the rod through the side of the engine case. Keep the stock. But if you must have the noise get a good non eBay short ram instead.
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