2016 Ford Focus ST3
Would you do it all over again?
Yes but not CARB legal...Been pondering the same thing.....This might be the better deal though Focus ST COBB V3 Accessport ECU Flasher, Low Restriction Intake, Intercooler upgrade & Calibration Package
not really needing water/meth - this is a daily driver and yes I understand that CA is limited to 91 octane...I highly recommend an investment in water-methanol injection.
A simple Stage 1 system is enough, because you will not get full power out of this investment without it.
91 is simply not enough octane and again Mountune's rating are based on 93 octane fuel which isn't available in California.
You will pick up 10-12 hp without any tweaking. If you experiment with the mixture you might pick up more.