he wants deeeebeeeeezzzzzzzz!
personally i've seen it done once in a show car and it was f'ing loud as hell. he had a pair of them and a pair of horns mounted on the trunk lid of a new dodge charger. it was louder than the dj who was playing at the show i saw it at.
if your just trying to get loud it's ok, but not at all for SQ no matter what vehicle it's going in.