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Old 03-20-2009, 05:04 PM   #1
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Basic Bolt-ons: Intakes and Induction

One of the first aftermarket parts folks like to install on their cars are aftermarket intakes. An aftermarket intake in most cases removes the stock airbox and replaces it with more of a free flowing setup. In this Topic I will go over what kind of intakes are out there and the pros and cons of each. Remember, all intakes fit both the 2.0L and the 2.3L. The only oddball is the 08-10 which only accepts the Steeda/FocusSport/AirRaid units as of yet.

NOTE: I have included links for pricing and pictures but by no means am I suggesting buying the particular product from that particular vendor. Do some shopping around, find the lowest price including shipping as that can be the deal breaker!

First off, there are two different styles of intake/induction setups. There is the shorty or short ram style and there is the cold air induction. Separately I have mentioned the "custom" intakes we have come up with.

Replacement Panel Filter:

There is no replacement panel filter for all but the 08-11 (non-PZEV) Foci due to Ford's decision to install a "maintenance free" lifetime air filter.

For the 08-11 (non-PZEV) models, K&N makes part #33-2401 which is available for around $45.99 from your local parts store.

Short ram intake:

Steeda 05-07 (note: will fit the 03-04 DTEC engines, but it is very tight against the headlight)
Steeda 08-10
AIRRAID Cold Air Dam Intake System 08-10

"Custom Short Ram"
The Custom Short Ram is built by removing the stock MAF tube, shaving off the tabs on both ends, flipping it and dremeling out the MAF sensor opening so that way it will fit in there facing the correct way, and then attaching one end to the stock throttle body boot and attaching a cone filter to the other end. It should sit right behind the driver's side headlight. If someone can find the "how-to" thread on this that would be greatly appreciated.

The benefit of this type of intake is that they are simple to install, they are fairly cheap and they give decent gains. Also, no risk of hydrolock.

These intakes can be louder then stock, for some folks this is a problem. Even though Steeda included a heat shield, they still take in ambient under hood air, which when the temps are hot can decrease power. There is a decent amount of air moving around when the vehicle is in motion however.

Cold air intakes:

Here are some of the more common cold air intakes you are likely to find.

FocusSport Cool-Flo (NOW FITS 08-11!)
K&N Typhoon
Cosworth (discontinued)

"Stealth CAI"

These intakes make nice gains throughout the rpm range, mainly due to the fact that they locate the filter in an area where it can take in fresh air.

Most CAI setups use a tube which requires the stock electronics from the MAF sensor to be removed from its stock housing and then placed in the intake tube. This makes upgrading to a larger MAF impossible without buying a new intake. CAI setups also place the filter in a location where it is able to get very dirty very quickly. CAI require more frequent maintenance than short rams. CAI setups are also susceptible to water ingestion, being that the filter sits so far down near the ground.

These are not all of the intake setups for the Duratec motor, they are a group of the more common and more well known parts.

Comments, discussion, and corrections welcome!

Disciple of the "Push harder, suck less" school of autocross.

crew #6

Last edited by warneej; 01-01-2011 at 08:37 PM.
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