Should I burn in the 4"s & 1"s before I install them in my car?

 

Before or after install really does not matter.

I know I put 80 hours on my Be's before any real tuning was done.

Before the drivers were installed I let them play for 2 days straight in shoe box enclosures.

Once installed, I let the car sit playing for 2 days straight at a low volume.

Then you tune

 

burn in is burn in it dont matter in the car or not just dont wast to much time tuning (other than basic level tuning and crossover tuning) before they've had about a week of playing otherwise you'll be doing it again