i havent done any performance mods to mine but the cheapest is get the afm from a supra
https://www.yotatech.com/forums/f116...estion-193204/ and you could put a cam and if you have some cash to spend
http://www.toyotacatalog.net/M1WebGe...spx?Class=1430
lcenginerring has alot of performance parts but there NOT cheap.