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Old 07-16-2013, 09:19 PM   #1
Pvtjoker53
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Hiflow cats on ebay

Does anyone knw anything abt the universal hiflow cats on ebay? Do they work well, sound good?


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Old 07-17-2013, 12:16 PM   #2
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I have no idea about sound (and that is a very subjective opinion anyway)

As far as working well... depends on what you mean by that. If you live in a state that does emissions testing, then you may or may not pass inspection.

A hi flow cat is a good mod, but you wont see as much gains on the SPI as with other cars. the exhaust system has a sort of bottle neck in the header, so to see the gains an exhaust / hi flow cat would normally provide, you have to fix the problem.

There are currently no aftermarket headers sold for the SPI. Best option is to buy a header for a 91-96 escort lx, and make it work with some modification. If I remember correctly, you should look for a 4-2-1 header.

See here for details: http://www.focusfanatics.com/forum/s...=escort+header
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Old 07-17-2013, 12:36 PM   #3
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So the long tube headers on ebay wont fit the spi?
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Old 07-17-2013, 12:47 PM   #4
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No. Any header you find that says 01-04 Focus will be for the Zetec engine. That will not fit on your SPI. (Basically, with all aftermarket parts, assume it is a zetec part unless it specifically says it is not.) They are two very different engines that actually don't have very much in common.

Zetec intakes can be used, but you need to have a 65 mm throttle body from a 96-02 Mustang GT, with some minor modifications. Or a 60mm SPI TB (which are very rare now. The problem with the zetec intakes, is that they do not have the same places to bolt on. I had a short ram on a 60mm TB, but because I could not attach the support bracket, the rubber tube from the intake to the TB cracked. I have since gone back to the stock intake, because I had it on hand.
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Old 07-17-2013, 12:58 PM   #5
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I have a zetec cold air intake on my car and i havent had any problems with it its been on there for a year it needs cleaned tho lol and i didnt modify any to use it i bought it off o ebay for $60
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Old 07-17-2013, 01:19 PM   #6
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Typically in the modding business, (especially when buying new parts) you get what you pay for. In order to make money, cheap parts need to cut corners. Typically this happens in R&D, and materials (such as filters). Because they don't put the same money into the parts, you don't get the same quality products.

There is probably little to no gain over stock for most ebay specials. Going fast costs money, and buying cheap parts will typically not help that goal.

How is your zetec intake attached to your throttle body?
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Old 07-17-2013, 01:26 PM   #7
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I used the stock rubber elblow that ran into the stock intake and just stuck it over the new one at the throttle body
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Old 07-17-2013, 02:11 PM   #8
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I am trying to remember installing my AEM short ram 8 years ago... IIRC, the stock elbow would not fit over the new intake (but I might be remembering that the stock elbow does not fit over my larger TB.) If I am correct, that might indicate that your piping is a little smaller than the name brand zetec intakes, which would mean less air flow.

There are two factors that dictate air flow in aftermarket intakes, one is pipe size and design, the other is filter. So keep the filter clean, and if you don't upgrade to one of the name brands, at least look into upgrading the filter.
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Old 07-17-2013, 03:19 PM   #9
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Yea i have i plan on picking up a new one when i do my next tune up, im pretty sure but could be wrong i think the piping is 3 inch pipe
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Old 07-17-2013, 03:27 PM   #10
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That sounds about right. And my memory is definitely not what it used to be.

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