Used: Mast Motorsports LS3 Black Label Cylinder Heads


- 255cc Int Port

- 106cc Exh Port

- 69cc Combustion Chamber

- Billet Rocker Rails

- Upgraded PAC1209x Springs


Heads have been checked and cleaned.

Roughly 20-25 passes on them, They were used as a temporary set on our CTS-V while waiting for our heads to be reworked with new valves.


Price includes both heads.

Mast 255cc LS3 Cylinder Heads