So i was just wonderin

I have a 95 Z28 M6 and 4 wheel disc brakes

I dont really know how the brakes work, but

When your doin a burnout, you rev it up and let off the clutch, then jump on the brakes...

I know the front brakes are engaging, but are the rears? and is it wearing them down to nothing by doing this?

 

Yep, it's wearing the rears.

 

The brake pads are always in contact with the rotors no matter what. When you're doing a burnout, they're definitely clamping down harder. Doing a smoky one here and there won't have you running to the store for new pads, but don't make a habit of it. (The brakes are the least of your worries if you're burning out a whole bunch.)

 

I wouldnt worry about the rear brakes.

 

If your worried about wearing your rear brakes out while doing a burnout, you should get a line lock so only your front brakes work when you engage it.

 

You can always get a line lock for a hundred bucks or so.

Edit: LOL LT1 POWR beat me to it!