Fuel Injector Click?

[9GSRtegra]

Im hearing a clicking noise thats pretty constant, I know its not lifters because Ive had a few of those that have needed adjusted and they sound different. I assume its the fuel injectors because that seems to be the place it is coming from (Used the old ear against a metal tube throughout the motor, and directly below the fuel injectors is where I found it)

If it is the fuel injectors clicking, is this a problem that needs fixed? Injectors going bad?

[nov0798]

the snapping noise you hear from the injectors is normal. nothing to worry about.

[fathead]

Injectors opening and closing makes a clicking noise.