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Discussion Starter #1
Not everyone can use a race header in their setup, for the folks who cannot and wish to remain emissions legal you can use a hi flow cat.

Hi Flow catalytic converters

There are truly only 2 hi flow cats on the market and they are:

Random technology hi flow cat
Focus central hi flow cat

PROS
A high flow cat can make very good gains when used along with a full length exhaust. A car using an aftermarket shorty, flexpipe and cat back can gain anywhere from 5 - 8 whp an as much wtq when adding a hi flow cat. A shorty header and hi flow cat combo also allow the engine to produce usable low rpm torque, this is good for daily drivers.

CONS
Hi flow cats can be pricey, a RT cat pipe goes for around $ 300 and the FC cat for around $ 250


Cat Eliminator pipe/Off Road pipe

Only one company makes an off road or cat eliminator pipe for the zetec equipped focus, that is focus central.

Focus central cat eliminator pipe

PROS
The off road pipe for the zetec is quick and easy to swap, so it’s a good part for someone who wants to remove their stock cat for a day of racing. They are also fairly cheap in price.

CONS
An off road pipe on your focus will make it very loud. The gains when using an off road pipe are ok but nothing to brag about.


If you have a question about one of these parts or another related exhaust part, feel free to PM me or e-mail me at [email protected]
 

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AKA Toyotech
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add all at once?...kinda hard to add a offroad pipe and highflow cat at the same time. what do you mean?
 

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richiejerzee4lfe said:
what happens if you add them all at once? will the computer go retarded?

depends- shorty header and high flow cat just reset the ecu. while with the orp you will need a mil eliminater.
 

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Not ness. if you do not remove the stock cat.......Also if you do install a high flow it will register less than the hot senser so no reset is needed..As for the race pipe if you install the cheater you still do not have to reset the cpu...It will not go stupid if you don`t break something in the process..
 

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whoa

i want to put in a high flow cat w/ my exhaust and shorty headers, so just unhook my battery and everything will be fine after the install? whats the deal focaltech? ive got a warranty on my car that i dont want to ruin too. [???:)]

[}:)]
 

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Discussion Starter #11
A flexpipe connects the fron part of the exhaust system, i.e. catalytic converter or race header, to the cat back system.
 

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im about to get this cat.. is it going to be easy to install? will there be a space for the plug thing that hooks up to the stock cat?
 

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no, i did my header.. i know how to get the bolts off..

im just wondering about the egr plug.. is there a spot on that new cat that im going to install...
 

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Mtn. Dew
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Yes, there is. It's a pain in the arse to get to the egr though.


I already have this cat, you should have checked it out on Sunday[:D]
 

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Mtn. Dew
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It should come with gaskets(I think), but you might want to use the gasket that came with the header.

Yes, I already have this cat.
 

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now its not coming with any gaskets.. im getting it from a friend for cheap.. he wrecked his car. this only has about 5k on it.

so its safe to re use the bolts and gaskets? ok cool.. im going to try to install it this sat.

what do i do about the egr? any tips on that?
 
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