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3" to 2.5" Taper = Power Loss?

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Old 18 September 2016 | 06:10 PM
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Thanks for all your help on this chaps.

I actually fitted the exhaust today!

My existing decat downpipe is 3" with a taper to 2.5". So it bolted right on.

My concerns were when I changed the existing downpipe to a full 3" with a sports cat. Then I would need to get the other pipe, which Tomei have confirmed is the same length. So it would fit fine with a full 3" downpipe and this other Main Pipe A.

But I have to tell you all that this exhaust is awesome!

But sadly it is WAY TOO LOUD.

I mean seriously ear splitting loud, sounds amazing but I can't drive a car in public that sounds like that, as much as I love the sound, it looks like I will have to sell it.

No sending it back as its special order and when I ordered it I was told I could not return it unless it was faulty in some way.

Unless of course a sports cat will quieten it down substantially!

Looks like I am yet again on the hunt for a suitable exhaust!
Old 18 September 2016 | 06:12 PM
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Anyone want to buy it?!
Old 18 September 2016 | 06:20 PM
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Originally Posted by DoZZa
Anyone want to buy it?!
What price are you looking for?
Old 18 September 2016 | 06:32 PM
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Ah, that's a bummer.

What a trial, eh.
Old 18 September 2016 | 06:55 PM
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Originally Posted by DoZZa
Thanks for all your help on this chaps.

I actually fitted the exhaust today!

My existing decat downpipe is 3" with a taper to 2.5". So it bolted right on.

My concerns were when I changed the existing downpipe to a full 3" with a sports cat. Then I would need to get the other pipe, which Tomei have confirmed is the same length. So it would fit fine with a full 3" downpipe and this other Main Pipe A.

But I have to tell you all that this exhaust is awesome!

But sadly it is WAY TOO LOUD.

I mean seriously ear splitting loud, sounds amazing but I can't drive a car in public that sounds like that, as much as I love the sound, it looks like I will have to sell it.

No sending it back as its special order and when I ordered it I was told I could not return it unless it was faulty in some way.

Unless of course a sports cat will quieten it down substantially!

Looks like I am yet again on the hunt for a suitable exhaust!
Shame you say it's soooo loud, I was hoping it might not be Blitz like and I want to enjoy it on the track - the noise wouldnt bother me with a lid on but the regs are a nuisance.

Out of curiosity, where did you get it from and how much did you with shipping and duty etc. Fell free to PM me as I'm not worried about the taper as I'm only looking for about 350/350

Last edited by JonMc; 18 September 2016 at 07:02 PM. Reason: spelling
Old 18 September 2016 | 07:16 PM
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Are you on a standard exhaust manifold or is it an stainless steel one?
Old 18 September 2016 | 10:20 PM
  #37  
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Originally Posted by ossett2k2
What price are you looking for?
Ideally near what I paid for it, so around £1,000.

Originally Posted by joz8968
Ah, that's a bummer.

What a trial, eh.
Nightmare mate, but at least the fitment was good!

Originally Posted by JonMc
Shame you say it's soooo loud, I was hoping it might not be Blitz like and I want to enjoy it on the track - the noise wouldnt bother me with a lid on but the regs are a nuisance.

Out of curiosity, where did you get it from and how much did you with shipping and duty etc. Fell free to PM me as I'm not worried about the taper as I'm only looking for about 350/350
I got it from Amber Performance, they are the only Tomei dealer in the UK.

Try Blitz loud x 10 and then you will be close to what this sounds like!

Originally Posted by banny sti
Are you on a standard exhaust manifold or is it an stainless steel one?
RCM stainless manifold mate.

Would a sports cat quieten it down?
Old 19 September 2016 | 12:10 AM
  #38  
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What did you think lad, its a straight though pipe with no rear silencer to speak of just a jap style box.

You think its loud now wait till all the carbon blocks up what silencing system is in place, it will just get louder, believe me i've been there.
Old 19 September 2016 | 12:44 AM
  #39  
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Originally Posted by jaygsi
What did you think lad, its a straight though pipe with no rear silencer to speak of just a jap style box.

You think its loud now wait till all the carbon blocks up what silencing system is in place, it will just get louder, believe me i've been there.
Yes, I knew it would be loud, but not this loud, its mental!
Old 19 September 2016 | 01:39 AM
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When I saw the pictures I thought how could someone live with that noise lol.

As regards the cat, it will help abit but nothing massive.
Old 19 September 2016 | 09:55 AM
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any chance of a video ?
Old 19 September 2016 | 04:37 PM
  #42  
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Doubt a cat would help at all, maybe because mine is an equal length manifold but imo the biltz is louder than the tomei
Old 19 September 2016 | 07:51 PM
  #43  
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Originally Posted by jaygsi
When I saw the pictures I thought how could someone live with that noise lol.

As regards the cat, it will help abit but nothing massive.
Seems as though a cat will make little difference like you say.

Originally Posted by Dave Y
any chance of a video ?
If I get a chance, I will sort one out, would be silly not to really!

Originally Posted by banny sti
Doubt a cat would help at all, maybe because mine is an equal length manifold but imo the biltz is louder than the tomei
I forgot you were twinscroll! Yes, probably due to the manifold.

Anyway, its coming off the car at the weekend.

I am looking at a turbo back system from either H&S or Cobra.

Going to start another thread and see what people think of each brand.
Old 19 September 2016 | 08:28 PM
  #44  
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My milltek is 86db at 4K rpm if any use
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