i have the greddy turbo kit, greddy intercooler, greddy type s BOV, greddy evo exhaust, and greddy turbo timer. (i like greddy). well with all that installed with the "blue box" (untunable), my car put down 216whp on a mustang dyno, which gives true hp.

if your check engine light is on, you must've installed the blue box wrong.

the greddy kit runs really rich and i even have a flat spot in mine around 6k where it just boggs down. but next week it will be tuned with uberdata and rc 550's and the shop tuning it said i will have about 275 or so WHP.

shmoo, if you are running the e-manage, you will need to get a FPR to raise the fuel pressure, incase you didn't already know.