Would it be worth it to get a centrifugal supercharger for a 05 scion tc being that they r just 4 cyl cars n all?

no. get a turbo. the centrifugal supercharger does not compliment the tc very well. if anything, the supercharger design should've been a roots design.

turbo = more power for the money.

you can now get a turbonetics kit for $3500, so its not much more than the supercharger + installation. u will get ur money is worth out of the turbo. superchargers have a history of not lasting very long.usually around 20k miles they crap out.or blow up ur engine. whichever.

lol just kill the engine why wont you

Normally l would say yes because its a TRD part & wont void any of ur warranty HOWEVER Toyota/TRD did a horrible job with that POS. Yes they will replace it when it breaks in about 15k miles but expect to be out of a car for 2 weeks while they look for new parts. The supercharger is out of production so they r just rebuilding the broken ones.

In this case ur best bet would be a turbo from a good aftermarket company. Have it installed & tuned by someone qualified. Turbos tend to cost more because they r more complex but they will make more power at the same boost level compared to a supercharger.