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      08-03-2020, 09:02 PM   #45
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Quote:
Originally Posted by Ninefourteener View Post
I've been seriously thinking about doing this since the very first post.

Seriously concerned about DRONE inside the cabin at highway speeds. Rather than going straight pipe or X-pipe.... I was actually thinking about doing an old-school H-pipe instead, and shooting for that "muscle car" sound. Same concerns though..... Drone.
I Dont have any drone whatsoever, even if you did, put it in ecopro mode on the highway and it would be all good.
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      08-04-2020, 08:46 AM   #46
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does this void the warranty?
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      08-04-2020, 10:52 AM   #47
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Quote:
Originally Posted by soniczoom5 View Post
does this void the warranty?
I highly doubt it
If it did it would have to be for a very specific reason and dealer would have to prove it.
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      08-05-2020, 08:15 PM   #48
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does this void the warranty?
I asked my dealer this and he said no, only Catalytic Converter back won't void.
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      08-06-2020, 12:58 AM   #49
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Originally Posted by 888RRE View Post
I asked my dealer this and he said no, only Catalytic Converter back won't void.
From what I was told when researching exhaust work, I would get that in writing from your dealer but like that will happen.

Where exactly are the catalytic converters on the States spec X5’s because in Europe ‘catback’ has two meanings
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      08-06-2020, 09:01 AM   #50
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Originally Posted by Addbuyer View Post
From what I was told when researching exhaust work, I would get that in writing from your dealer but like that will happen.

Where exactly are the catalytic converters on the States spec X5’s because in Europe ‘catback’ has two meanings
for US spec cars the Catalytic Converter is also known as the downpipes
so its cats, then the resonator (front muffler) and then the rear muffler
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      08-06-2020, 01:11 PM   #51
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Originally Posted by Tim2189 View Post
for US spec cars the Catalytic Converter is also known as the downpipes
so its cats, then the resonator (front muffler) and then the rear muffler
I’ve learnt that we have Down pipes with cats, then OPF filter, then secondary cats followed by resonator and into the back box (muffler)
So as previously stated, cat back can be either from the downpipes or the middle cats.
No wonder our V8’s sound like a sick mosquito
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      08-14-2020, 05:09 AM   #52
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I’ve learnt that we have Down pipes with cats, then OPF filter, then secondary cats followed by resonator and into the back box (muffler)
So as previously stated, cat back can be either from the downpipes or the middle cats.
No wonder our V8’s sound like a sick mosquito
So the secondary cats and resonator have been removed. The beast has awoken, so pleased i didn't go the downpipe replacement route first because the sound is just right and ive got pops and bangs to go with it.
Three hour job in total to drop the exhaust to weld the tops of straights.
As you can see, in the EU we have secondary cats just in front of the resonator. I stall have the OPF's and cats on the downpipe so i hope it wont fail emissions or locate a friendly tester
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      08-17-2020, 03:06 AM   #53
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Quote:
Originally Posted by Addbuyer View Post
So the secondary cats and resonator have been removed. The beast has awoken, so pleased i didn't go the downpipe replacement route first because the sound is just right and ive got pops and bangs to go with it.
Three hour job in total to drop the exhaust to weld the tops of straights.
As you can see, in the EU we have secondary cats just in front of the resonator. I stall have the OPF's and cats on the downpipe so i hope it wont fail emissions or locate a friendly tester
Cool, can you post a small sound clip? Interested, how this „combination“ sounds like, since you have the OPFs still onboard.
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      08-17-2020, 10:14 AM   #54
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Quote:
Originally Posted by Addbuyer View Post
So the secondary cats and resonator have been removed. The beast has awoken, so pleased i didn't go the downpipe replacement route first because the sound is just right and ive got pops and bangs to go with it.
Three hour job in total to drop the exhaust to weld the tops of straights.
As you can see, in the EU we have secondary cats just in front of the resonator. I stall have the OPF's and cats on the downpipe so i hope it wont fail emissions or locate a friendly tester
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      08-17-2020, 12:15 PM   #55
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Had anyone been able to answer exactly what diameter piping is used to delete the resonators?

Still planning on doing an H-pipe, but I need to start searching.
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      08-17-2020, 12:41 PM   #56
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Quote:
Originally Posted by rookee View Post
Cool, can you post a small sound clip? Interested, how this „combination“ sounds like, since you have the OPFs still onboard.
I’ve tried downloading a video but keep getting the message saying security token is missing

Last edited by Addbuyer; 08-17-2020 at 01:09 PM..
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      08-17-2020, 01:24 PM   #57
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      08-17-2020, 01:45 PM   #58
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Careful the UK tube isn’t a different OD like the exhaust tips are
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      08-17-2020, 02:04 PM   #59
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So.... I've just watched a TON of videos.... and I think I'm ready to take the plunge on this. Honestly, I'm not crazy about the "pops and crackles" I'm hearing with straight pipes, and I'm not looking for the "raspiness" generally associated with X-pipes either..

With that said.... I'm going to go with an old-school H-pipe, and hopefully get more of a deeper "muscle car" sound, versus a modern European sound.

Nothing against anyone else's personal choices.... but I think an H-pipe is best for me.

I know the pipes are 3" ID..... but can anyone tell me about how LONG the resonator is? X pipes are so popular now, but H pipes are tougher to find, so I need to make sure I get one long enough to replace the resonator.

Anyone have their resonator removed, that can take a quick length measurement for me please?
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      08-18-2020, 05:28 AM   #60
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Quote:
Originally Posted by Ninefourteener View Post
Anyone have their resonator removed, that can take a quick length measurement for me please?
Mine measures 330mm. This allows approx 5mm either side of the factory join.

Can you not take it to an exhaust specialist and let them worry about the reinstatement H-Pipes?

Took Torquflow 3 hrs start to finish, they did 90% of the work with the system in place and dropped the exhaust down just enough for the weld around the top of the pipes
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      08-18-2020, 08:16 AM   #61
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Quote:
Originally Posted by Addbuyer View Post
Mine measures 330mm. This allows approx 5mm either side of the factory join.

Can you not take it to an exhaust specialist and let them worry about the reinstatement H-Pipes?

Took Torquflow 3 hrs start to finish, they did 90% of the work with the system in place and dropped the exhaust down just enough for the weld around the top of the pipes
Thank you. 330mm... or 13 inches. I can work with that.

I don't have a lot of "specialty" places anywhere near me. And what few places there are.... are 2-3x more expensive, especially when you have an American accent.

I may end up going that route..... but this is a simple exhaust job. No "bends" requires. I have a difficult job paying anyone to do a job that I can do myself.
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      08-18-2020, 09:47 AM   #62
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Quote:
Originally Posted by Ninefourteener View Post
So.... I've just watched a TON of videos.... and I think I'm ready to take the plunge on this. Honestly, I'm not crazy about the "pops and crackles" I'm hearing with straight pipes, and I'm not looking for the "raspiness" generally associated with X-pipes either..

With that said.... I'm going to go with an old-school H-pipe, and hopefully get more of a deeper "muscle car" sound, versus a modern European sound.

Nothing against anyone else's personal choices.... but I think an H-pipe is best for me.

I know the pipes are 3" ID..... but can anyone tell me about how LONG the resonator is? X pipes are so popular now, but H pipes are tougher to find, so I need to make sure I get one long enough to replace the resonator.

Anyone have their resonator removed, that can take a quick length measurement for me please?
This is US spec Resonator
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      08-18-2020, 09:52 AM   #63
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Quote:
Originally Posted by Ninefourteener View Post
So.... I've just watched a TON of videos.... and I think I'm ready to take the plunge on this. Honestly, I'm not crazy about the "pops and crackles" I'm hearing with straight pipes, and I'm not looking for the "raspiness" generally associated with X-pipes either..

With that said.... I'm going to go with an old-school H-pipe, and hopefully get more of a deeper "muscle car" sound, versus a modern European sound.

Nothing against anyone else's personal choices.... but I think an H-pipe is best for me.

I know the pipes are 3" ID..... but can anyone tell me about how LONG the resonator is? X pipes are so popular now, but H pipes are tougher to find, so I need to make sure I get one long enough to replace the resonator.

Anyone have their resonator removed, that can take a quick length measurement for me please?
This is US Spec Resonator, not sure if its different
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      08-19-2020, 07:58 AM   #64
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Awesome Tim. Thanks!!!

My car is a US spec as well, so it will be an exact match.

Thus far, the only suitable H-pipe I've found (pre-fabbed) is 12" long.... so it would be very close. I'd like to find one that is 13" so there is some overhang. Still looking.

This helps considerably though. Thanks!
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      08-19-2020, 01:33 PM   #65
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Thanks again everyone...... I just ordered a total of 2 universal H-pipe kits, after speaking with a friend who is a welding/exhaust pro, who is incidentally, also going to help me with the fabrication.

We've already worked out the plan...... going to make a dual H-pipe setup, with 2 crossover pipes, exactly 12 inches apart from one another. That should be enough distance to disrupt the airflow without impeding it..... and then disrupt the airflow again 12 inches later.

This will add a bit of volume by eliminating the resonator.... but will also eliminate the raspiness of an x-pipe..... as well as the crackly/poppy-ness of a straight pipe setup.

The sound I'm going for...... is "1972 Chevelle". I watched a video of a guy with a twin turbo V8 Mustang... who switched from a triple x-pipe to a triple h-pipe.... and the "volume" was the same... but the tone of the H-pipe was much lower and blurblier. Fingers crossed.

More to follow when everything arrives.

How many unique words did I make up in this post? Lol
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      08-19-2020, 04:11 PM   #66
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Quote:
Originally Posted by Ninefourteener View Post
Thanks again everyone...... I just ordered a total of 2 universal H-pipe kits, after speaking with a friend who is a welding/exhaust pro, who is incidentally, also going to help me with the fabrication.

We've already worked out the plan...... going to make a dual H-pipe setup, with 2 crossover pipes, exactly 12 inches apart from one another. That should be enough distance to disrupt the airflow without impeding it..... and then disrupt the airflow again 12 inches later.

This will add a bit of volume by eliminating the resonator.... but will also eliminate the raspiness of an x-pipe..... as well as the crackly/poppy-ness of a straight pipe setup.

The sound I'm going for...... is "1972 Chevelle". I watched a video of a guy with a twin turbo V8 Mustang... who switched from a triple x-pipe to a triple h-pipe.... and the "volume" was the same... but the tone of the H-pipe was much lower and blurblier. Fingers crossed.

More to follow when everything arrives.

How many unique words did I make up in this post? Lol
That sounds awesome
Make sure to document it and make a new thread once its done!
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