Air fluttering noise 6th gear WOT

[Mike-uk]

hi all hope you all had a good Christmas

noticed a strange noise in 6th at 60Mph at WOT it sounds like air fluttering or a misfire but with air ?? any ideas, car was in not long ago for air leaks, not sure if its me but the car just doesn't feel right, when WOT the seems like its trying to give me all its got but not doing it how it should, like said not sure if its just me or weather there is something wrong some where

cheers

[rich83]

Perfectly normal, and more pronounced once remapped!

[Mike-uk]

ok cool, don't seem to do it in any other gear though, I might try some new coil packs as I don't think they been changed for well over 50 odd thousand miles, sometimes the car pulls strong but others it feels like its struggling