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is this high flow cat look good ? it looks abit different to me

 
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looks like it'll fit our car. i think. the downpipe seems a bit longer.. I mean before the curve...

and er.. looks like its most likely a straight pipe than an actual cat convertor.

 
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high flow cats usually don't do much at all. It is usually just a straight pipe with not much catalyst inside. That looks more like a resonator to me than a converter.

 
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I have that hi-flo cat. It is Megan Racing. Works really well once broken in and sounds good at mid-range. Mid-range and top end pulls a little harder.

 
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i have been told by a bunch of ppl that high flow cats are pointless, the gov't regulates how much stuff is inside a cat, so unless u makt urself, its a waste of money to buy one. the only thing i see good in it is if its a wider pipe size.

 
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a high flow cat will allow gases to travel through it faster, where you can gain a few hp. You will lose some torque because you will be losing backpressure. if you can do it, straight pipes will provide the most hp, but you usually can't get away with that unless you have a pure race car.

 
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will that fit with an aftermartket header, say a DC Sports ceramic 4-1 header?

 
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If you live in states with poor emission controls and no state inspections than just run that or even better, a piece of straight pipe. Here in Florida they have no laws at all i think regulating emissions, compared to NY where you need to have inspections and emissions testing.

 
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Yes, it has a bolt pattern. All cat-backs, headers, and hi flo cats have a bolt pattern. It is very common to mix-match different cat-backs, headers, and hi flo cats.

 
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Not true - almost all converters (not labled as "racing" converters) have virtually the same "amount" of catalyst in them (regulated by the gov't). The only difference between them is that a "high-flow" cat has a larger surface area, which causes less of a restriction to flow (ie a properly designed true high-flow cat will have a large short barrel type catalyst vs a long small, narrow one). This accomplishes the same thing, but reduces the pressure gradient across the catalyzing material.....

Racing converters I believe do have less, which is why they say "off-road use only" on them - because the government can't regulate off-road vehicles.

 
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The one in the picture above that I have (Megan Racing) said "off-road use only) and the piping was bigger than the stock rusted downpipe.

 
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the picture i posted in first post was a topspeed downpipe

how do your high flow cat sould people ? good or bad ?

 
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Wondering the same ^^, i belive the megan and top speed are the exact same downpipes.


I will either be getting one of these downpipes or a magnaflow converter that has to be welded on

 
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Look at this one http://cgi.ebay.com/ebaymotors/ws/eB...tem=2451296883

 
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that isnt the actual pic it is it ? because our high flow cat is a longer l pipe

 
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check this one out

http://cgi.ebay.com/ebaymotors/ws/eB...ory=33629&rd=1

 
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I just bought this , http://cgi.ebay.com/ebaymotors/ws/eB...tem=2451455740

 
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kool let me know how it works, if you get a nice gain and if its cheap i notice from profile you dont have power steering pulley, did you take it off ?

 
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i have a d15b block with d16y8 head and i wired up my vtec today it comes in at 5200, the check engine light is no longer on only problem is that the limiter is coming in a 7500 and ecu is programmed to 10,000rpms, anyway it works on my friends d16z6 very good and revs all the way to 9500, i tried another ecu and its the same thing so its something with the engine can someone help me with this please ? thanks i haev i/h/e zex cam, fuel pressure regulator
i have a zex cam and valve springs and retainors

HAPPY NEW YEAR

 
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u have two cars?

 
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^wrong post????^

I was curious too... how does it sound with I/H/E???

 
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i aslo was looking at the mid pipe on ebay, will i still pass inspection with it? I live in NJ...

also you guys remember the post about our civics making a crazy ratteling/gringding noise when it rains only.... you think a new cat midpipe will resolve that issue? (i know its a bit off th etopic but all you got to do is say either yes or a no) thanks

 
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No you will not pass inspections....with any high flow cat

unless its one of magnaflow/carsound's or random tech

 
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thanks man..^^