What is the standard boost on a VX Calais and what can a stock motor handle safely?

The standard boost pressure on a VX Calais L67 is 6psi, while they can comfortably take around 10psi on a standard engine/tune running 98 octane fuel. With a tune and intercooler (depending on the type), they can comfortably handle running a 19psi pulley with a 5% overdriven balancer.