Btw, the abbreviated version only consists of 5 honks (ie "chinga tu madre" without the "cabrón" at the end), which is much more common in cdmx these days.
As a matter of fact, there's a common interaction in which one person will do the 5-honk salute and the receiver will reply with the missing 2 honks.
You can hear a couple of samples of that on sound file #13.