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-   -   3" to 2.5" Taper = Power Loss? (https://www.scoobynet.com/general-technical-10/1041889-3-to-2-5-taper-power-loss.html)

DoZZa 18 September 2016 06:10 PM

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!

DoZZa 18 September 2016 06:12 PM

Anyone want to buy it?!

ossett2k2 18 September 2016 06:20 PM


Originally Posted by DoZZa (Post 11877228)
Anyone want to buy it?!

What price are you looking for?

joz8968 18 September 2016 06:32 PM

Ah, that's a bummer.

What a trial, eh. :(

JonMc 18 September 2016 06:55 PM


Originally Posted by DoZZa (Post 11877227)
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 :thumb:

banny sti 18 September 2016 07:16 PM

Are you on a standard exhaust manifold or is it an stainless steel one?

DoZZa 18 September 2016 10:20 PM


Originally Posted by ossett2k2 (Post 11877231)
What price are you looking for?

Ideally near what I paid for it, so around £1,000.


Originally Posted by joz8968 (Post 11877233)
Ah, that's a bummer.

What a trial, eh. :(

Nightmare mate, but at least the fitment was good!


Originally Posted by JonMc (Post 11877243)
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 :thumb:

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 (Post 11877249)
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?

jaygsi 19 September 2016 12:10 AM

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.

DoZZa 19 September 2016 12:44 AM


Originally Posted by jaygsi (Post 11877354)
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!

jaygsi 19 September 2016 01:39 AM

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.

Dave Y 19 September 2016 09:55 AM

any chance of a video ?

banny sti 19 September 2016 04:37 PM

Doubt a cat would help at all, maybe because mine is an equal length manifold but imo the biltz is louder than the tomei

DoZZa 19 September 2016 07:51 PM


Originally Posted by jaygsi (Post 11877365)
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 (Post 11877409)
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 (Post 11877526)
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.

bustaMOVEs 19 September 2016 08:28 PM

My milltek is 86db at 4K rpm if any use


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