More Power

Hi guys,
I just bought a 99’ 106 1.0i.
Is there anything that can be done for cheap to make it go slightly faster?

I plan to change the engine to a 1.6 but that isnt happening for a while, as i am going to daily the peugeot for the next half of the year.

I was thinking air restrictor delete, and cat delete. Anything else to make this car more snappy?