Not necessarily. Increased boost does increase the airflow, which is more important. But if there are a lot of restrictions or chokepoints in the turbo or intake plumbing, this will create heat, BAD for your engines! It's best to minimize pressure loss by upgrading all your turbo plumbings, especially if you want to boost past 1.5 bar for a stock-engine EVO. Again, I have a friend who upgraded his entire plumbing just because it looks cool though he can't boost past 1.05, maybe 1.1 bar if he's lucky because he has practically no pressure drop or loss in his plumbing system.