New K11 Owner looking for upgrades

As stated above I just bought a 2001 K11 1.0L s and reading one here people are doing all sorts of upgrades

I plan on keeping the car 1.0L but want to squeeze as much power out if it as possible. Hopefully someone with more experience than myself can help.

If I go the budget route what's the best aftermarket air filter and bolt on exhaust (no welding as I don't have access to the equipment)

And if I manage to go balls-to-the-walls what do I need and how much will it roughly cost for an ITB setup?

As an added bonus could someone please decode the jargon for me?

Thanks in advance
 
Before you set out to do an ITB setup you'll need a tuneable ECU, or a nitsune daughter board attached to your current one. However from what I've seen on here a lightened flywheel should be a top priority mod to increase hp and more importantly throttle response.
 
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