my old evo 2 had one fitted as standard and to be honest never used it much but when i did play it didn't really feel any different as said just sprays water over the intercooler the evo used water from the washer bottle which wasn't ideal this could be done quite easily just use a couple of mk4 washer jets a universal washer pump or s/h pump and bottle bit if pipe work and wiring and job done probably worth a go
