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focaltech 02-22-2004 10:54 AM

Basic bolt ons: Hi Flow cats and Off Road pipes
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

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.

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

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

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

richiejerzee4lfe 03-02-2004 08:56 PM

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

Kicknzx3 03-02-2004 08:59 PM

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

drewzx3 03-02-2004 09:02 PM


Originally posted by richiejerzee4lfe
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.

richiejerzee4lfe 03-02-2004 09:36 PM

sorry, i meant if you add the shorty headers, flexpipe, cat and cat back exhaust

Lil_RedZX3 03-02-2004 11:09 PM

Just unhook the battery before you install everything, and you'll be fine.

liquid01 03-04-2004 11:25 PM

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..

frogg5872 03-27-2004 01:02 PM

i broke stuff.....and had to replace it all. BE CAREFUL TO NOT BREAK STUFF!

socrates 03-31-2004 07:42 PM

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. [???:)]


streetfocus 04-02-2004 06:21 PM

New to this, can anyone explain more about a "flexpipe"? What is it and what does it do?

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