Does anyone know what the stock boost is on a 2003 a4 quattro? Also is it okay and safe to raise it? What would I need to replace or buy to do this? thanks

 

a good search would of netted you a plethora of answers, but to answer your questions

a) peak is 10-12 settle at 8
b) yes and no... yes if done right, no if you just slap a boost controller
c) you can do the diode mod combined with a boost controller and get i would say safely 16-18 peak 14 settle or you can buy a tuned ecu and have about 20-21 peak and 18 settle


there are a few tuners(this is bound to be your next question) apr, giac, unitronics are the bigger ones.... might search the classifieds on the big audi forums(here, az, vortex)