you still may not pass emissions with a GReddy kit. i didnt. anyhow. the greddy kit is a smaller turbo, quick spool and still decent power. good for a daily driver. you should have literally no problems out of it. and you dont have to run blue box. it's just a preset fuel curve for the boost. you can drop that, tune it, and make plenty of power (250whp like u say). revhard is a t3/t4 turbo ... something like a 56mm trim turbo. it's gona use the FMU i would imagine. fmu is no good over 9 psi. you'd have to re-tune w/ something else. fmu only jacks fuel pressure up too. bad on gas. if you have a stock motor, there's no need for custom. it would be overkill. if you have any other ?s, PM me. i know EVERYTHING![]()