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Thanks broAlthough Cobra is louder than Milltek.
Resonated is louder than OEM, but as I heard correctly from a m8 of mine. You will only hear it when flooring it. Cruising is (very) quiet, exactly as he wanted it.
Do you have a stock downpipe + kat? If so, these dampen the sound a lot. Switching to bigger dp + sportcat will give more exhaust note.
Also check these vids:
https://www.youtube.com/watch?v=UHdx2eR29Is&list=UUzxx8sGqRBlzpxdofAculnA
https://www.youtube.com/watch?v=aS85jNV7RgM&list=UUzxx8sGqRBlzpxdofAculnA
https://www.youtube.com/watch?v=jFCCCHwvyRY&list=UUzxx8sGqRBlzpxdofAculnA

Then I would recommended the resonated version.
I had a full cobra system non res and it was to loud for me, i had a silencer fitted and it was still too loud. So I went and bought a milltek non resonated full turbo back. It's quiet and I'm glad I didn't go with the resonated system. When booting it you get a bit of noise but I wouldn't class it as loud what so ever. When cruising along and driving normally you can't hear it. Inside it's literally wind and engine noise.
If I was you I would go for the non resonated especially if you have the standard cat and downpipe as a resonated would be quieter than standard IMHO
It's been on there over a month now. With the windows shut andI driving along I can't hear anything. Even on torway it's silent. Outside you get a bit of noise but not excessive at all like the cobraould barely hear people talking to me inside the car when driving. A mate of mine has a LCR and his just decatted his standard system. IMHO outside his is louder than mine