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Discussion Starter · #1 ·
Hi all, I just got a new 2012 Xb and while I don't plan for extensive modding I do think a CAI is in order.

Here's what I found, any thoughts?

Injen Cold Air Intake: Scion tC 2011 +

Thanks.
 

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if you are interested, i have the AEM for 260, the Dc sports for 179 and the injen for 279. its shows up to 2010, however sometimes with the new model car, my distributor doesnt list the newest year. should fit. lmk.
 

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2011 Scion xB Release Series 8.0 SoundWave
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I did this one and it works fine in my 2011 Release Series 8.0. $70. bucks plus $24 shipping and no light comes on. Some of the naive people will tell you, you have to get the K & N ones or the really expensive ones or you will have all kinds of issues and lights coming on. I drive 41,000 miles a year to and from work. I have 23,000 on my car already this year and I bought it January 16th 2011. No issues on it at all. Also, get any crap from the dealer about it? http://www.me-mag.com/Upload/magmoss.pdf Hit that up. I am not a believer, I am a tester.
http://cgi.ebay.com/ebaymotors/SPYDER-POLISHED-08-11-SCION-xB-2-4L-COLD-AIR-INTAKE-KIT-_W0QQcmdZViewItemQQfitsZMakeQ3aScionQQhashZitem5ae1ccb5aaQQitemZ390335346090QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
 

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I thought the entire concept of a "cold air" intake was to bring in cold air from outside? I don't see how any of these other than the TRD which gives you a better forced induction into the intake.
 

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CAI isnt forced induction.

Cold Air Intakes are the ones that do have the extra tube that draws air from areas away from the motor and heat. Short Ram Intakes and essentially designed to allow a greater volume of air to flow into the motor with less restriction. I've run my Injen in both configurations and can't tell a difference other than sound (I prefer the CAI). IIRC the CAI did bring in slightly colder air but the difference was so minimal that I wouldn't put a lot of thought into it.
 

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Royal Floor Sweeper
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A well designed CAI or "ram air" is a small-level forced induction, as the "force" more air into the intake manifold than it would "suck-in" on it's own. The force isn't great, but it is more than "normal." They are really only "forced" is they are designed in a way that air pressure is raised somehow by the forward momentum of the vehicle and then the air is shoved into the intake manifold.
The TRD one supposedly has a ram-air effect in its design. Some "short ram intakes" do as well, but many are just called that when they are actually just short-intakes w/ no real ram-effect.
IF designed right, CAI and SRI CAN have a limited forced induction capability. Still, they are much less than systems designed to be fully forced-induction from the start.

What most people think of when they hear/read "forced induction" is superchargers or turbos. Those 2 types force in tremendously more air than the system would suck-up normally. Both use compressors to compress and shove air into the intake manifold. Superchargers have the compressor spun on a belt-driven pulley that is connected to engine flywheel. The amount of spin is based on pulley sizes and ratios to each other. Turbos have what is basically a windmill in the exhaust manifold that spins the compressor. As for which is "better" depends on intent, design, and application. They are both great, just different.
 
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