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...
I'm seeking for best missfire sytem for my r33.. but can't find much info about it..
I've heard about FireStar, with a funtion to control max rev.. but no one sell it at my area...