Alot of cats run VPCs... I just sold mine to one of the Jake's on this site... *LOL! There are about 20 of us, lol*
Supraman, the vpc would surely be legal in Cali, all it does is change from a, I think karman signal to a speed density... I think thats what stock 7Ms run on, a karman? Anyway, it basically allows you to use larger turbos and do full spectrum fuel tuning... I loved it... I hope I dont regret selling it...