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Old 09-03-2016, 03:34 AM   #1
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H-Pipes

I know there's a lot of subjectiveness on which setup sounds best. With that said is there a big tone difference between aftercat H-Pipes from different brands?
I have pype bombs and like how loud they are but I'm trying to cut out some of the rasp..maybe Mac prochamber, heartthrob flow pack cat-to-axle, or mbrp xp series h-pipe?

Any input would be appreciated!


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Old 09-03-2016, 12:08 PM   #2
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I think the pro chamber would do better than a regular H. or swap out your pypes for magnaflows.

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Old 09-03-2016, 01:15 PM   #3
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No subjectiveness, H pipe sounds better, that's y they come w one from the factory! Haha.
I can't imagine any H pipe sounds different from another enough to be able tell the difference. The Mac Pro chamber is a little different since it's a chamber (from my understanding) so there is more volume in it than the H piece of pipe. I almost went with the Mac but if I remember correctly, they don't offer a true 3". I have a Borla 3" touring catback which came with an X pipe, switched out the X for a MBRP H pipe. Honestly I could've lived with the Borla X on that system, it's nice, some rasp but so much more mellow than other systems I've heard. The H pipe gives a little more rumble, especially with back pressure when downshifting.
I think the Mac Pro chamber is seriously worth considering though.
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Old 09-03-2016, 01:44 PM   #4
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Thanks guys
I looked into the macs and it seems they have some quality issues and you were right they don't offer a 3".
Beviking how do you like the mbrp?


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Old 09-03-2016, 06:37 PM   #5
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I like it! Really good quality, clamps that came with it are beefy. I'd definitely buy MBRP products again. Actually, thought about trying a set of their Axlebacks but read there may be drone. No drone w borlas.
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Old 04-15-2017, 10:04 PM   #6
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I have stock h pipe with stock resonators and Flowmaster Outlaw Axlebacks and I love it. It sounds like a true muscle car. Not raspy at all. I may try cat deletes but I worry about the stench.





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Old 04-16-2017, 08:33 AM   #7
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Stench and a whole lot of nasty sound (imo)...
You may like the sound but any I've heard and many threads say once the cats go the sounds goes too, in that it turns to raspy & blatty noise. If you can swap them out n back in if you don't like it, go for it and see.
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Old 04-16-2017, 08:51 AM   #8
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Quote:
Originally Posted by Beviking View Post
Stench and a whole lot of nasty sound (imo)...
You may like the sound but any I've heard and many threads say once the cats go the sounds goes too, in that it turns to raspy & blatty noise. If you can swap them out n back in if you don't like it, go for it and see.

I've seen that many have the same opinion as you and now I'm having 2nd and 3rd thoughts about Cat Deletes. I may not do it after all. Although the muffler guy will only charge $40 to install them I don't wanna spend $150+ dollars on a part that will eventually collect dust if I don't like the sound or smell.


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Old 04-19-2017, 08:51 AM   #9
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If you guys haven't had or heard an offroad setup that sounds good you need to get out more I'm sorry.


My old combo was a basic whatever H pipe (pace setter or something) and Dynomax Ultra Flow catback. Sounded glorious. No rasp or anything.
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Old 04-19-2017, 09:34 AM   #10
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Originally Posted by Beviking View Post
Stench and a whole lot of nasty sound (imo)...
You may like the sound but any I've heard and many threads say once the cats go the sounds goes too, in that it turns to raspy & blatty noise. If you can swap them out n back in if you don't like it, go for it and see.
Maybe on the 3.7. My car sounds pretty Damn good with car deletes

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Old 04-19-2017, 10:29 AM   #11
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Originally Posted by scottydsntknow View Post
If you guys haven't had or heard an offroad setup that sounds good you need to get out more I'm sorry.


My old combo was a basic whatever H pipe (pace setter or something) and Dynomax Ultra Flow catback. Sounded glorious. No rasp or anything.
I've stayed away from off-road pipes due to NY laws. Not sure I'd pass emissions tests with one.
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Old 04-19-2017, 10:37 AM   #12
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I've stayed away from off-road pipes due to NY laws. Not sure I'd pass emissions tests with one.
Aftermarket H pipes with high flow cats (one cat per side) should be louder/better sounding than the stock midpipe and still pass emissions in most cases. X pipe setups on all the overhead cam engines seem to be raspy. It sounds wet and slappy LOL. I have and offroad H on mine, but I wouldn't be too unhappy if they started doing emissions testing again. I'd just opt for the catted H setup I mentioned.
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Old 04-19-2017, 10:40 AM   #13
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You can't post that here.


Quote:
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I've stayed away from off-road pipes due to NY laws. Not sure I'd pass emissions tests with one.
It wouldn't be easy, trust me.
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Old 04-19-2017, 11:38 AM   #14
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I've stayed away from off-road pipes due to NY laws. Not sure I'd pass emissions tests with one.
You can't pass emissions without one regardless. Even if you could pass the sniffer you'd auto fail the visual. It is a federal crime to remove/modify ANY emissions equipment so even the 2 catted aftermarket pipes are technically illegal. Why I stopped running O/R pipes honestly. Not to mention there is little to no power loss with a fresh set of high quality cats.

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Old 04-21-2017, 11:33 AM   #15
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Aftermarket H pipes with high flow cats (one cat per side) should be louder/better sounding than the stock midpipe and still pass emissions in most cases. X pipe setups on all the overhead cam engines seem to be raspy. It sounds wet and slappy LOL. I have and offroad H on mine, but I wouldn't be too unhappy if they started doing emissions testing again. I'd just opt for the catted H setup I mentioned.
Kook's Long Tube headers and their GREEN catted H-Pipe are going on my 2013 GT, Emission legal in 49 states.
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Old 04-21-2017, 12:03 PM   #16
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Kook's Long Tube headers and their GREEN catted H-Pipe are going on my 2013 GT, Emission legal in 49 states.
That's gonna sound great!
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Old 04-21-2017, 08:56 PM   #17
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Quote:
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Kook's Long Tube headers and their GREEN catted H-Pipe are going on my 2013 GT, Emission legal in 49 states.
That's gonna sound great!
That's what I would do if I go with aftermarket headers.
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Old 04-22-2017, 05:24 AM   #18
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The Kooks green cats will still throw a CEL thus not allowing you to pass emissions.
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Old 04-22-2017, 08:22 AM   #19
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Tune, no CEL^
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Old 04-22-2017, 08:49 AM   #20
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The Kooks green cats will still throw a CEL thus not allowing you to pass emissions.
It's my understanding this won't happen with a tune. I'm pretty sure Kooks made the green cats to be emissions compliant.
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Old 04-22-2017, 09:47 AM   #21
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It's my understanding this won't happen with a tune. I'm pretty sure Kooks made the green cats to be emissions compliant.
They did
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Old 04-22-2017, 11:14 AM   #22
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Quote:
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It's my understanding this won't happen with a tune. I'm pretty sure Kooks made the green cats to be emissions compliant.
They did
Haha! Posted before seeing your reply mustangz
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Old 04-22-2017, 11:37 AM   #23
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Tune, no CEL^
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Originally Posted by Beviking View Post
It's my understanding this won't happen with a tune. I'm pretty sure Kooks made the green cats to be emissions compliant.
Wrong. Go over to mustang6g and ask all the guys running the green cats with tunes about it. It's a major problem for them.
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Old 04-22-2017, 07:18 PM   #24
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With longtubes and all the o2 ****... just run dummy cats to keep any cop that pulls you over happy and tune for no cats.
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Old 04-23-2017, 08:33 AM   #25
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Wrong. Go over to mustang6g and ask all the guys running the green cats with tunes about it. It's a major problem for them.
They all have the same tuner?
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Old 04-23-2017, 11:04 AM   #26
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They all have the same tuner?
Different tuners leaving the rear o2's on. Guys are installing the Kooks green cats and then getting a CEL for cat efficiency.
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Old 04-23-2017, 03:54 PM   #27
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Wow, why would kooks waste time and $ to make a green cat that isn't compatable and won't pass emissions?
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