Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Gutted or not hfc

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Old Dec 26, 2013 | 12:41 PM
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Gutted or not hfc

[IMG][/IMG]Got these for a really great price, sold as regular hfc however I'm paranoid and haven't found a definitive way to tell if they're Gutted
 
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Old Dec 26, 2013 | 12:50 PM
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Looks like a resonated straight pipe. There are "cells" in any catalytic converter like below. Are your pipes hollow all the way through?

 
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Old Dec 26, 2013 | 01:04 PM
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OP that is not a HFC. +1 what Herrschaft said about resonated test pipes
 
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Old Dec 26, 2013 | 01:11 PM
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That's not an HFC. If you could put a stick through the pipe, it's not an HFC. HFC will either look like the pic shown or have a spun metallic core (looks almost like a loose roll of foil). But there will always be a core of some kind. Those aren't gutted either, as the other posters mentioned, it's a resonated test pipe. The holes are part of the sound suppression.
 
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Old Dec 26, 2013 | 07:35 PM
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Originally Posted by jkuo
That's not an HFC. If you could put a stick through the pipe, it's not an HFC. HFC will either look like the pic shown or have a spun metallic core (looks almost like a loose roll of foil). But there will always be a core of some kind. Those aren't gutted either, as the other posters mentioned, it's a resonated test pipe. The holes are part of the sound suppression.
These are the pipes so they're not gutted?
 
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Old Dec 27, 2013 | 01:31 PM
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You can't tell from the outside since a resonator and hfc shell look about the same. But the inside of yours shows a resonator. HFC inside should look like this (not my pic, but my Berk HFC looks the same). See how there is material there, that's the catalyst. If you don't have it, it's not an HFC. And yours isn't technically "gutted" either. Gutted implies that you took an HFC and knocked the core out which people do if it fails. Yours is a resonated test pipe. If you don't have to worry about emissions in your area, run it.

 
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Old Dec 28, 2013 | 01:05 AM
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Originally Posted by jkuo
You can't tell from the outside since a resonator and hfc shell look about the same. But the inside of yours shows a resonator. HFC inside should look like this (not my pic, but my Berk HFC looks the same). See how there is material there, that's the catalyst. If you don't have it, it's not an HFC. And yours isn't technically "gutted" either. Gutted implies that you took an HFC and knocked the core out which people do if it fails. Yours is a resonated test pipe. If you don't have to worry about emissions in your area, run it.

So I basically got gipped? Sold a hfc without a catalyst?
 
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Old Dec 28, 2013 | 12:24 PM
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Originally Posted by NeverTooFast
So I basically got gipped? Sold a hfc without a catalyst?
No, they sold you a resonated test pipe. If they told you it was a high flow cat then they either lied to you or are an idiot and don't know the difference
 
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Old Dec 28, 2013 | 02:33 PM
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Being uninformed/ignorant is NOT the same as an idiot.

If you have never seen a cat before, how would you know.

BTW, please don't take off your cats, it makes you car stink something awful.
 
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Old Dec 28, 2013 | 05:59 PM
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Yeah I guess I was uninformed but after looking at the post on this site and seeing over 5 users say "great price on these hfc glws" I guess It was my mistake for believing the seller
 
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Old Dec 28, 2013 | 06:20 PM
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https://g35driver.com/forums/engine-...est-pipes.html Says at first they are test pipes then a user posts two pictures of the hfc and test pipes then says based on pics they are hfc along with other users, this shouldn't be my fault but there's nothing I can do, at least I get more gains
 
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Old Dec 28, 2013 | 07:12 PM
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Originally Posted by NeverTooFast
https://g35driver.com/forums/engine-...est-pipes.html Says at first they are test pipes then a user posts two pictures of the hfc and test pipes then says based on pics they are hfc along with other users, this shouldn't be my fault but there's nothing I can do, at least I get more gains
Its not your fault, the seller is an idiot for not knowing what he had and falsely advertised. If he's not willing to do anything then he's a POS and should be banned. I'm assuming you bought these before October 23'rd since thats when the truth came out in the FS thread.
 
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Old Dec 28, 2013 | 07:30 PM
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Originally Posted by herrschaft
Its not your fault, the seller is an idiot for not knowing what he had and falsely advertised. If he's not willing to do anything then he's a POS and should be banned. I'm assuming you bought these before October 23'rd since thats when the truth came out in the FS thread.
I've had them for a while just thought they were regular hfc, then about a week ago I started thinking they were Gutted, regardless I got them for around 200 bucks and give more gains then hfc, I can't really expect much
 
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