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Topic Review (Newest First)
03-30-2016 01:47 PM
sparky34kv Sailor, thanks for assist. I appreciate the reply. I am trying to make smart improvements on the car. Had it almost 10 years and have no intention of getting rid of it.
03-29-2016 06:05 PM
sailor As long as the gauge for your filter still shows good you don't "need" a replacement. You can double check it's operation by pressing in on the end to reset it, then seeing if the reading ends up similar after driving a while.

There are methods posted in here for doing a couple alternative filter setups to save $ over those "performance" intakes where you put a washable cone style filter either on the end of the MAF tube for a CAI (cold air intake) with the filter low to the ground at the bottom of the engine compartment OR an SRI type using the stock MAF tube reversed & modified to attach directly to the throttle body connector for a home made SRI (short ram intake).

Any of the alternatives can increase power over a plugged up stock filter, not going to have an appreciable affect on MPG for improvements. Usually done for power/sound and less $ than stock replacement when needed.
03-29-2016 10:38 AM
Just Asking

I saw this before and just had a couple of questions. I have an 04 ZTW with the 2.3 liter engine, I believe it is a Duratec. I want better gas mileage and don't really trust the lifetime air filter, especially since it has just over 120,000 mies on it. Does taking it out and going with a simpler CAI or Short Ram give better daily driver impact or is this more for performance minded people? I do have to occasionally drive 580 miles to help my son out in Ohio so any improvement to MPG is appreciated. I want to make improvements on the car but only if they make sense.
04-26-2015 08:52 PM
Rwishon13 I'm not brand new to the focus world, but did just purchase my first one. It's an 08 coupe, manual transmission. I have a lot of things I want to do and posts like these are helping me make more informed decisions.

Good post, keep em coming.
10-07-2014 07:30 PM
JLokiG Learned! Thanks!
04-17-2014 10:06 PM
ProdigyRacingLA Nice read, glad it was stickied. Information can always be referenced. Writing it down to reference later is important. Otherwise we wouldn't bother writing down a record of things in life.

Anyways... lol
09-23-2013 05:37 PM
benoit230 So I was looking at getting a cai and this is the only thing I am finding - K&N says it's a cold air intake but I found other sites calling it a short ram intake, should I take K&N's word?
09-23-2013 03:46 PM
benoit230 can this be updated? Only the FSWerks link worked =/
09-08-2013 07:21 PM
Originally Posted by wkampenhout View Post
Hello Gents,

Looking to pick up a CAI next week and read through the thread completely a second time (cause im a noob). Heres my one question.

I see alot of people have gone with the K&N 2nd Gen of the 57 series. Located here:

However, whenever I try to search by car, all I get is a 57i series, located here:

I wanted to know firstly, will a FIPK fit into a 2007? I have the Street appearance package if that makes a difference.

Secondly, has anyone has experience with the 57i series? Thoughts?
I know Im late, but the FIPK will fit up to 2007. I had one on mine. I would get any other CAI before that one, the MAF area wasnt sized correctly and your car may or may not have problems (lean code) because of it.
09-08-2013 06:41 PM
soundFocus Just putting up a little review... I bought CFM's kit, which I am 90% sure is virtually identical to FSWerk's. I went with the CFM because I live on the East Coast and shipping was cheaper than FSWerk's. Installation as just alright; instructions applied more to the 1st gen Focus and was vague on where to put the hoses and what parts I needed to get them to fit. Otherwise, it sounds better anyway. No real difference in power though throttle response is a bit quicker. MPGs are up about 1 mile consistently and my instant MPG graph regularly shows an extra bar compared to before the kit.

I would not worry about hydrolock. If you're really concerned like me you can just put an Outerwear prefilter on it, which is probably a good idea anyway as it will absorb some dust and hopefully increase the recharge intervals for the filter itself. Otherwise, the bottom cover isolates it will from water, and if you're really concerned there is enough wiggle room that you can angle the lower pipe with the filter more towards the front of the car, further away from the end of the lower cover.
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