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Discussion Starter #1
My buddy has a High flow Cat that he bought for his Jetta. Long story short he had to take it off because it threw a code with it in. Well I can get it from him for cheap but is the Focus the same? Do you have to have the correct cat so it doesn't throw a CEL or would it be fine to put in and would you do it?
 

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if it fits i dont see why you couldn't use it. the secondary cat on our cars isnt monitored by the PCM so i dont see how you could get a CEL. and trubendz sells their kits with no cat, just pipe to eliminate the secondary cat completely

and maybe someone can correct me if i am wrong, but the high flow cat that i have is just a 2.5'' in and out vs the smaller size of the stock one hence you'll get higher flow. Not sure if the way the cat is made is different to get better flow though
 

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Not sure that it will make that much of a difference with the manicat in place.
 

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Discussion Starter #4
The manicat?
 

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The stock exhaust manifold is called a manicat. Because it is both the manifold and the first cat all in one. Hence manicat. lol. And he is saying you will probably not yeild many gains with the HFC since the first cat attached to the manifold is still in place.
 

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damn manicat. soon to be gone though :D
 

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Discussion Starter #7
AH. I had no idea. Ya I want that gone too.
 

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Just remember that when you remove the manicat that you have removed a major emissions item. So check you state laws on that if you care about it.
 

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Discussion Starter #10
I do state inspections as long as the computer doesn't know then it'd be fine.
 
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