If you have a clean (no oil) stock IC, and no boost leaks I doubt there is much to be gained from a FMIC.
Even so, I just finished installing a Greddy 3 row for stock twins on my car (pain is the ass).
My car had a recently cleaned stock intercooler, no boost leaks (I check this stuff) and dyno'd at 425 rwhp, best trap speed 117.3.
Others will tell you that you will pick up 2-3mph of trap speed even though the dyno won't show the increase since there is no airflow. I hope they are right, but I won't be disappointed if I don't gain that much.
It's there for when I single the car.
Even so, I just finished installing a Greddy 3 row for stock twins on my car (pain is the ass).
My car had a recently cleaned stock intercooler, no boost leaks (I check this stuff) and dyno'd at 425 rwhp, best trap speed 117.3.
Others will tell you that you will pick up 2-3mph of trap speed even though the dyno won't show the increase since there is no airflow. I hope they are right, but I won't be disappointed if I don't gain that much.
It's there for when I single the car.