I'm thinking of replacing my stock 255lph fuel pump with an AEM 355lph fuel pump. Is the stock fuel pressure regulator and injectors OK or do I need to replace those as well? If I do need to replace what is the psi setting I need to set the regulator to? And what kind of injectors? As of now I was just going to use a fuel injector service kit. Also, are there aftermarket fuel rails for the 4G94? Thank you in advance for your replies and knowledge.