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Why are you not sure? Have you decided that us Picanto drivers should not have any choices!

Of course you have a choice but why not make it a sensible one and buy a car that does not need modifications to meet your needs. Its what I and most sensible people do.

 

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These boxes can actually increase MPG in certain situations due to better mapping.

Just sales patter. The only way to improve mpg is to drive slower.

 

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True. In the Polish Picanto racing series a simple ECU modification, K&N intake and exhaust mod gave the 1.25 litre engine 74 kW instead of 62 kW. That is a lot with no actual mechanical modifications. But it obviously did not meet road going emission standards with those mods.

To get that kind of increase on a N/A engine with only simple mods is going to need some serious ignition advance and that will require some special fuel to prevent the engine turning into a grenade.