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Cheez 06-21-2012 02:06 AM

Best CAI for my '07
So I have seen all these pics and people talking about CAI on their first gen foci. But I dont have the same set up, with the lifetime filter it is a totally different set up in the '07. First off, how do I replace it with an aftermarket CAI and what sort of other mods am I going to have to do? Second, which would be the best CAI to get? Any info or advice will really help for what I want to do. Thanks guys! [thumb]

2007 2.0l Duratech ZX3 S

rambleon84 06-21-2012 09:48 AM

It's pretty easy to install, I have the same model as you... You remove all of the stock intake (which isnt hard but its the longest part of the install,) starting after the throttle body. Careful with the MAF, as you will be reusing that sensor. I found it easier to jack up the drivers side of the car and I may have removed the front wheel (you need to take off some of the splash shield to easier access some of the bolts holding on the different intake parts.)

Most CAI's will come with pictures/directions on how to remove the old and install the new one. I have fswerks ( and it came with pretty straight forward directions. I am happy with it, have had it installed for about 2 years now. The ITG filter it comes with is washable and should last as long as you have the car, buy the oil spray with the CAI.

Here is a very large image of my engine bay, click to zoom. You can see the difference on your car to see what I removed.

Here is the stock MAF tube, you will need a set of torx bits or allen keys to remove the MAF sensor (3mm i believe.) You will be reusing the MAF and screws, mind the direction it is facing in the tube and reinstall it to the new CAI the same. Everything else is just basic hand tools.

Here is an ugly picture of the stock intake that will be coming out of the car, pretty much all of the black plastic stuff comes out:
You have a resonator, the filter element and snorkel to remove (i was lazy and left the upper snorkel part)
(this was after an accident, you do not need to remove the quarter panel or headlight lol)

Drumr90 06-21-2012 09:54 AM

Posted via FF MobileI have a 2006 with same setup. Now do u got to worry about any water hittin filter?

rambleon84 06-21-2012 10:08 AM


Originally Posted by Drumr90 (Post 4224696)
Posted via FF MobileI have a 2006 with same setup. Now do u got to worry about any water hittin filter?

There is a splash shield that keeps any direct water from hitting the filter element, as its tucked right behind the front bumper. Of course, do not drive through standing water that is higher than your bumper. They sell hydrophobic socks that cover the main filter that will resist water too. I have driven in some pretty heavy downpours with lots of water on the road and have not had any issues. Be smart and you will be fine.

Of course if you are worried about it, then dont get a CAI and stick to stock or a SRI like what Steeda sells. People who have the Steeda intake are generally just as happy with it as the folks that get a CAI.

CFM makes a CAI that they can include a bypass filter on. If the primary filter becomes submerged, a second filter is in the system opens that bypasses the main filter. It is located higher up and should prevent your CAI acting like a straw.

Drumr90 06-21-2012 12:50 PM

Posted via FF Mobile
I dont drive through deep water. Just have been stuck in rain thats right at bottom of my bumper. As long as its tucked away i should be good then.

bellis58 06-21-2012 12:56 PM

I put my Steeda CAI in my car weeks after getting it. Been driving it for years, through rain, snow, mud, etc.

No problems whatsoever. I mean, I don't rally it or anything, but a CAI for a daily driver should experience no problems. There are tons of options for CAI's. I can only personally speak for the Steeda. I love it. Definitely can feel the difference when you initially install it and it gets you that nice CAI sound.

Drumr90 06-21-2012 01:02 PM

Posted via FF Mobile
Cool cool. I was originaly lookin at the k&n typhoon intake. Maybe ill look around more and see whats out there

Cheez 06-21-2012 06:29 PM

Awesome guys, exactly what i was hoping to hear. Will be savin up and probly have to make a choice on which one I want to get. Was lookin at the steeda just cause it is bada** lookin. But the fswerks looks more functional and more to what is originally on there. I also had no idea that the snorkel went that far up. Kinda cool i suppose. But anyways thanks for the info. Will post updates about what goes in and maybe some pics as well.

whynotthinkwhynot 06-21-2012 08:05 PM

Moved to Duratec Performance. Ford Focus Technical chat is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls. Thanks for posting!

ergo-ogre 06-21-2012 11:03 PM

The "Stealth CAI" is simple and effective. All ya need is a cone-type filter like K&N RC-9160 universal with a 3.125" intake flange:

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