Well its all done now its almost back to standard but of course i have kept the quads on there so there is no drone any more only a slight one very quiet again but when you give it some beans its a lovely V8 sound im in the middle of getting pipercross to make an induction kit for the S8 and A8 4.2 engine should be with me on tuesday or wednesday next week so i will report in with the result i think it will sound nice with a roar to it but the advantage is of course that you can keep it quiet when driving and after 4k rpm it will bring the engine to life a bit
thanks for all the advice on this