Re: BOLT-ON OR CUSTOM INTAKE?
Any intake that will bolt up should work fine. Really a good aftermarket filter is the most important part, followed by a freer flowing intake tube. So an intake from any car that will properly fit yours will do as good a job as any other; check out other Toyota models with the same/similar engine.
I'd do some research first, to see how well the stock intake actually flows. Some cars (like WRX) have a stock intake which can support much greater than stock power, so a simple filter upgrade is the best mod for light power upgrades.