Personally im not running W/M to run higher tunes because APR didnt recommend it for their 100 oct tune when i called them. I run it for other benefits such as keeping my intake temps cooler and to also keep my engine cleaner with the 51% water mixture. The shop that installed everything "Tomas Sport Tuning" recommended the AEM kit. They installed it, ran it, logged it, and gave it to me nice and safe. I did however pick my own start and full settings. Like i said im not using it to run more aggressive tunes so my start psi is 5 and full is 15. im extremely happy with it, but if i wanted to gain more power from it, i would have Unitronic tune it to gain max power out of it. Ill prob do that when i go K04 hopefully... Lol