Do you need a custom tune when you have cams, headers and exhaust?

Basically, do you need to get a tuner to program you a tune and send it to your Predator or SC2 every time you install a mod on your car?

 

For the exhaust changes, no- a tune isn't required.

For the cams though, I would think a tune would be required. And, I'm not sure how it might effect the variable cam system. Remember to upgrade your valve springs (depending on the grind).