HKS boost controller with low & high settings. 0.95 bar & 1.25bar. Remap in a few weeks will probably allow me to raise it a touch more.
Rarely use the high boost mode. Had the Evo about 6 weeks now. Used high boost 4, maybe 5 times. Times i can specifically remember are against a Yamaha R6 then the other i can remember was when playing with a TVR Griffith 500.
The other times are prob just on way home from work when i've been on late shift & roads are dead
As for having anything else i the car. There's nothing left laid about. Can't do with clutter or mess. Even my £100 workshed Fiesta is clutter free