Intake exhaust and chip will be enough for the 1.3 to almost match 1.5s. I'd say from 85 hp to about 100 hp.

To match the big boys (Ecoboost, Accent Diesel), you need a turbo.

But by the time you get a decent turbo kit, you've spent enough to buy up. Heck, the CRDi starts at just 728k.

Not to say that upgrading is pointless. I think a chip and header combo, plus 15" wheels and decent tires are about all you need to have a little more fun with your car.