Turbo or Cam upgrades simply pull more air into the engine which allows more fuel to be burned per minute, so you get more power.
MAF system reads the "mass" of the air coming in, so would read the extra air being used, it would work fine.
One point that can come up is that a stock MAF has a diameter just above that needed by the stock engine at full throttle, that will only allow XX amount of air in per minute.
You can use a bigger diameter MAF, but only if you think that is an issue after engine is up and running, too large a MAF can cause idle issues.
Same with stock injectors, they should be fine, if you are talking about a 10-20% increase in power.
Fuel injectors are not like jets were on a carb.
Jets were fixed fuel meters so had to be changed if you increased the air flow rate, injectors are adjustable, on the fly, fuel meters.