we use iridiums, they are as "best" as you can get. However there won't be performance gains using a "better" spark plug. only available in NGKs or the Denso ones. Bosch may have them too. I use penrite HPR5 at least. i currently use SIN5 which is a step up from HPR5. brake, power steering and radiator just use the genuine toyota ones. fuel filter use the denso one. oil filter use baldwin if u can get ur hands on one. the part number is B37 for the 2zzge. u doing this urself?