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The mkiv Supra Owners Club

Decat noise DB Question


Jellybean

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Car is BPU , has a whifbitz 1st decat , 3 " high flow 2nd Cat (SARD I think) and a HKS Silent system

 

I was thinking of putting on a 3" Blitz decat pipe to replace the 2nd CAT

 

She is roughly 97 - 99 db at the moment but was told the Blitz decat would eliminate some of the drone

 

MOT is not an issue as a 93 in Ireland is exempt from emissions

 

Maybe a Waste of Money , maybe she will sound too loud ?

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I have passed the NCT with one cat on the noise front, haven't tried it with both decats im afraid. It was a 2.5" first decat, 2nd cat and 3" system after that, small little centre (one lane in) as well and it was booming everywhere lol.

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This is my 93 BPU double de-cat with a HKS Hi-Power Silent. This is a -5 'C coldstart, but I do find it annoyingly quiet unless when im going WOT. At normal idle or highway cruising it's not noticeable.

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