Title References

did anyone else notice how the title is referenced throughout the movie? and no i dont mean how they say he kills every 5 years for 5 days and 5 couples i mean like these two i got:

#1- when the 2 detectives are calling in the cars one of them is car 555
#2- in the set where the posters decapitation takes place 555 can be seen spray painted on the wall.

now there must be more so help me find 'em!