Hi
Im thinking of putting this rs4 brass ferrel to increase fuel pressure from 130 bar to 136 bar as it states it does...
Can i get some pros and cons on this before i install it please from some freinds here that have used it?
Im looking to get a little better torque curve and somemore power in holding boost better up around 5000 rpm...
Waitng for some opinions on the use of this rs4 ferrel...
Thanks guys!
