Camaro ZL1 1LE front 390mm rotor weight comparison. I will put out a video next week on the Racing for ALS Youtube. I'm going to DBA for this season, but was surprised that they are heavier than the factory rotors. Rotor thickness was 35.8 to 36 mm for all three disc.
Edit: Added Video
Edit: Added Pricing
Fronts
Griodisc with Hats $1200 - KNS Brakes
Girodisc Rings with Hardware $850 - KNS Brakes
Factory GM complete $826 -RockAuto.com
DBA Rings with Hardware Kit (reuse OEM hats) $740 - KNS Brakes