You can do a bunch.
What are you looking to spend?
Do you want forced induction?
Or do you want to be all motor? (like me
there'* a m90 supercharger kit comming out for your engine by zzp (www.zzperformance.com
)for under $1,000
Turbo and CSC supercharger kits are available for higher prices by zzp and www.stattama.com/
And both zzp and www.intense-racing.com
sell cams,heads,valve springs and a bunch of other stuff.
I would definatley do the basic stuff first, tune up, cold air intake, 180 thermostat,