well i brought the -31 actuator and fitted it this morning. theres deffinetly a diifernce compared to my standard but i think that might be something to do with the extra boost it seems to be running. i guess the car isnt chipped as it seems to be hitting the boost limiter at about 15 heres a pic of my boost guage i am reading it right arnt i the 15 is 15 psi thanks