Quietest sports cat exhaust?
10 October 2010, 10:11 PM
#2
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Sports cat does not affect noise. Just ensure you keep a resonated centre section and a quiet back box and all will be well. Revolution, RCM, Scoobyworld, Scoobyclinic and others do good systems but of course as always it depends on what you want to spend.
10 October 2010, 11:27 PM
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Leb
10 October 2010, 11:38 PM
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Mix n match is not an issue when all parts are stainless anyway but of course a whole system makes sense if you are buying all at once 
As I said above, the main noise issues come from the centre pipe and back boxes, so no matter what centre pipe you get if it is resonated then that is as good as it gets for noise reduction there. The other main difference will then be in what back box you have bought. Blitz Nur are good but I have no experience of the noise.
I currently have a Thundercat sports downpipe, non-resonated centre section and a Scoobyworld Racebox back box. I have a Ninja 1 in the shed as this was too loud for me having had it for years I wanted something quieter. I think most of the exhausts could come with the quiet "stealth" option nowadays anyway. Not all of us want the noise.
I personally like the Scoobyworld stuff.
As I said above, the main noise issues come from the centre pipe and back boxes, so no matter what centre pipe you get if it is resonated then that is as good as it gets for noise reduction there. The other main difference will then be in what back box you have bought. Blitz Nur are good but I have no experience of the noise.
I currently have a Thundercat sports downpipe, non-resonated centre section and a Scoobyworld Racebox back box. I have a Ninja 1 in the shed as this was too loud for me having had it for years I wanted something quieter. I think most of the exhausts could come with the quiet "stealth" option nowadays anyway. Not all of us want the noise.
I personally like the Scoobyworld stuff.
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12 October 2010, 10:33 PM
#10
haywood and scott will build what you want and the quality is very good. The cheapest option if going 2.5 dia is a used prodrive downpipe and a cat back system. Thats what i would do unless i needed 3 inch dia.
31 October 2010, 11:09 PM
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i have a spec d and what to change my full system but want to keep the same noise ie very quite. anyone got an ideas as i want to get more power out of it with a remap also and fuel pump etc
01 November 2010, 08:56 AM
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I've got the Milltek 3" system with the 100 cell sports cat. Its louder than a std exhaust, but very pleasant & on a run at 70 its very quiet indeed, certainly no droning.
01 November 2010, 10:03 PM
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Speak to ExhaustsUK.com - they'll build you any system you want for a very good price. Quality and service is excellent and they can make it as quiet or loud as you want
01 November 2010, 11:40 PM
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Magnex and Milltek are meant to be the quietest systems. I've been out in a classic scooby that a had a full Magnex system on it and it was no different to standard in terms of noise.
As for a 100 cell cat making a difference in noise levels, they can. The one I had on mine made a difference. You could actually hear the turbo spool up with the 100 cell cat on, with a standard cat I very rarely actually heard the turbo. Note, for this comparison the rest of the exhaust was left alone....can anyone say MOT
(100 cell cat was not enough for mine by itself after it was modded)
As for a 100 cell cat making a difference in noise levels, they can. The one I had on mine made a difference. You could actually hear the turbo spool up with the 100 cell cat on, with a standard cat I very rarely actually heard the turbo. Note, for this comparison the rest of the exhaust was left alone....can anyone say MOT
(100 cell cat was not enough for mine by itself after it was modded)
01 November 2010, 11:54 PM
#18
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Im running a Milltek full system no cats and on its last track day It measured 96db at 4k and failed the drive by noise test But I don't drive the car everyday so i'm not changing it because it sounds awesome
Just wish there was more tunnels in West yorkshire
Just wish there was more tunnels in West yorkshire
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