Can anyone advise price and source of a water injection sustem for 1997 STi?

 

you could try TSL Motorsport who supplied my Perrin/Aquamist system 3years ago.
I haven't had any recent dealings with them but the system was sourced from the States and is a standalone with it's own controller and has all the built in safety features.
Trev

 

Aquamist is one of the most common systems.......I got mine from Aquamist UK.

Horrendously expensive though, I'd try and find something second hand or look at alternatives.

Shaun

 

Thanks for the info..