Fuel Injectors AEL 140 HP

Hello everyone, I drive an A6 with a 5-cylinder engine, model AEL, with 140 horsepower. I've read that increasing the power could be achieved by using larger fuel injectors and possibly increasing the turbocharger boost pressure. Can anyone tell me if there are larger fuel injectors available for my engine, and how I can increase the turbocharger boost pressure at home?
I look forward to lively and informative participation.
Best regards, Bastianna.

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