Not all the cars backfire but a lot do. I remember Barrichello's Honda used to backfire like a friggin bomb! His downshifting was mental! The BMW's used to sound VERY amazing, and the Ferrari's obviously sound special also. I've not heard the F1's with the 18K rpm limit yet, but I doubt they sound as good as in 2007 when it was 19,000 RPM
Ear plugs are for pussies!