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High Flow Cat

 
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Old 10-13-2007, 10:17 PM
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High Flow Cat

Hey guys...question. Is buying a high-flow cat worth the money? I was planning on buying the Greddy evoII catback, and cam across the Random Tech. high flow cat. I figured since i was under the car with the exhaust coming off, maybe it'd be a good idea to do them together. Has anyone seen any gains with these things? Are they worth the time, effort, and money? Also, has anyone gotten a CEL code from changing it out?

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Old 10-14-2007, 12:17 AM
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Being that you've got a bunch of views and no response let me tell ya this your not going to see too many gains. This is what i've heard on other forums and mags i've read. just replace it with the oem or an aftermarket on a hi cat flow one is not the way to go. That's my opinion!!
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Old 10-14-2007, 06:41 PM
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You have to think of the exhaust system as an air distribution system. The short and the tall of it is YES you will see a gain with a high flow cat, just due to it's less restrictive design.

But is the gain worth the money? Personally, I think every little bit helps. You may think differently.
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Old 10-14-2007, 07:03 PM
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you will not throw a code. I did the greddy evoII w/ a dc header and a test pipe and didn't throw codes. the Highflow cat would be a good purchase, it will compliment any other upgrades you do as far as air and fuel are concerned. it will allow more range in tuning as well.

plus chances are it's about time for your cat to be replaced anyhow.
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Old 10-15-2007, 12:21 AM
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doesnt it come with a cat when you buy the evo 2 exhaust
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