How to get more horsepower out of a 2006 Scion xA?

[daremaster7]

I have a 2006 Scion xA with a custom cold air intake and a High Flow catalytic converter with a custom downpipe and a 4 inch diameter muffler. I looked into getting a supercharger but was wondering if there is anything else I could do to get more horsepower out of my car. I don't want to go spending $4,000 on a supercharger yet. Anybody know anything else I can do to get more horsepower?

[ryan]

not much y dont u upgrade into a scion xd.

[stv6669]

You will not get any additional horse power out of a scion xA without a turbo charger. The Supercharger was discontinued so do not waste your money on it. The turbo beats the supers hands down in ever testing and reliability. If you are running an automatic transmission do not waste your money.

[lovely.car51]

Install performance chip in your car. It will really help u to increase the performance.