hmm...is very easy to discribe... you watch fast and furious?? the orange supra... when racing with black mustang almost ending of the movie....thats the sound like.....
If you are in 0.7 bar and above, you will get a very loud and clear sound of it...normally people wouldnt get this coz the price of it is more expensive than SARD "duck mouth" type...
Salam n good day for all ZTH forummers,
recently i've confront with this issue...
before this when i drive the car,the engine run smoothly..
just after i had my engine failure and changed my pistons then the issue...