Ticking....

Seem to have some kind of ticking noise when I throttle real hard. Car is kinda loud so I don't know if its something I havent noticed till now or if its a new sound totally. I thought at first maybe it was an exhaust leak but everything seems to be tight. It does seem louder inside the car than outside. Could that be the injectors squirting or something? I thought maybe it was engine internal but it only does it at really hard throttle and not at idle. Is it just a 5.0 noise maybe? Any help would be good....I have no idea what it could be.