If noise is setting off a car alarm, it is not installed or adjusted properly. The shock sensor is supposed to detect someone jacking the car or removing a wheel. It should not trigger on anything less.
I can start my LoBak equipped, 12.5:1 compression 427 right beside my truck, inside my garage, without setting off the alarm.
An alarm that falses all the time is nothing but a nuisance.
As far as loud cars go, they're fine when used as toys, but I can't imagine putting up with one daily. I value my hearing more than that.
It always irks me when I hear some jackass romping on an unmuffled Harley or fart-pipe equipped jap car late at night. Whatever happened to common courtesy???
Later,