Question about mod!

[Daviddrapeau]

Couldnt find any answer no where and im getting pissed lol , i have a supra 1996 jdm turbo and wanted to know if i remove the catalitic converter do i have to remove both and since its a jdm where do i get that restriction plate that they all talk about , wanna know too if its really necessary to install bigger injectors since they say the 443 cc can handle 425 hp , also what other mod should i do to get it to 400ho with a twin turbo without doing conversion to single ive got already intake , intercooler and exhaust done , i wanna get a boost controller and that fuel cut defender , anyway if somebody could help me a bit would be good i just got it imported from japan i read a lot but im not 100% sure about nothing lol