>>13749944>>13750004It's especially easy on cars with forced induction, particularly turbocharged cars.
Hell, the Chevrolet Cobalt SS Turbo came with 260 HP and the dealers offered a ecu reflash to bump power to 300 HP with no other mods. That's dealers. not voiding the warranty Aftermarket tuners have gotten as much as 330 from those engines with just a tune, so yes. It is possible.