Stealth CAI--What to expect and what NOT to do. - Page 2 - Ford Focus Forum, Ford Focus ST Forum
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Old 04-13-2009, 10:45 AM   #11
whynotthinkwhynot
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Great job and good thinking bro!!

I'm a tad ashamed and surprised that nobody else thought of it. Now you just have to get rid of the silencer box, and you'll be home free to a homemade CAI
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Old 04-16-2009, 12:10 AM   #12
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i'll probably be selling my Stealth CAI v.2 piping from my car. I have Cool-Flo now, so I won't be able to use it.
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Old 04-17-2009, 11:45 AM   #13
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Originally Posted by jhurst747 View Post
It depends on the brand of filter I'm thinking. Some filters have a more flexible rubber compound whereas others are stiffer. Even using a screw driver to help things along (yes, I tried almost every lube known to man...I'll leave that to your imagination) and it was still a bust.

The author notes that you can get a K&N that fits on there perfectly with a 3.25 ID but that's only if you're in the market for a 60 dollar filter. Since I had to go through 2 filters to get it to work, I should have just bought the danged K&N the first time.
Sort of helps if you pay attention to the article before you run out and spend a bunch of money!

As I stated I used a Spectra filter with a 3, 3 1/2 and 4 opening. Many people have used this article to build an inexpensive CAI, I am still using it to this day with no adverse affects.

Im glad I could help direct people towards and effective and inexpensive CAI.

Enjoy
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Old 04-17-2009, 08:28 PM   #14
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Your article helped me tremendously. I was just building on it a bit to help those who aren't overly familiar with some of the mundane portions of "getting started".

Thanks again!

PS. I also went with the Spectra brand the first time. I should have done some more searching but at the moment, my local auto parts store only had the 3" filter in stock. Lesson learned!

Last edited by jhurst747; 04-17-2009 at 08:30 PM. Reason: added comment.
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Old 04-22-2009, 04:33 PM   #15
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a 3 inch filter is a pain in the ass to put in. that's why i'm using a 3.5" coupler over a 3" coupler with my design. check it out!
So where can I get those couplers?

Thanks!
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Old 04-23-2009, 08:57 AM   #16
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Added to the 'HOW TO ARCHIVE'......
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Old 04-23-2009, 09:13 AM   #17
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You can get the couplers at any Autozone or Advance Auto. Keep in mind that some of the filters you can buy will come with the three different sizes of couplers.
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Old 04-24-2009, 09:12 PM   #18
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Im doing this tommorow. Even if it doesnt increase power at least I will be able to lose a few pounds frome the huge amount of junk I will pull off
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Old 04-24-2009, 11:08 PM   #19
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If you guys have ever noticed, the stock intake draws air from the front lower grill. There is a duct there, so it would be smart to use Y type tubing that leads there to one of those filters where the front of it is open for tubing and the rest looks like a normal filter(pepboys has these) and putting one of those mesh screens on it that prevents hydrolocking. So you have a filter drawing really cold air and then the stealth filter thats boxed in drawing in secondary air so its like having two places where you get cold air from making alot more air flow. What do you guys think?

Also with any filter install, make sure to unhook the battery negative terminal to reset your ECU so that the car goes into emissions learning mode and the sputtering doesn't happen.
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Old 04-25-2009, 05:52 AM   #20
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you could unhook the battery or just let the car idle for like 10 minutes. it'll relrearn.
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