I just finished installing and adjusting my Banks Bighead wastegate actuator and I feel a MAJOR difference! I was skeptical about the product because of the guys on here that were saying that the have one and it does nothing. When I first put it on I gave it 5 turns of preload then drove it with no real difference, so I made me up a nice contraption out of a tire inflator that has the pressure gauge on it(like what's at the gas station air machine) and screwed a female coupler and a hose barb to the end of it instead of the air chuck.($26 at home depot) the pressurized the wastegate feed line and saw it was opening around 24psi, so I pressurized unbolted the head and gave it one more turn clockwise and that put me right at 30psi. So I got in it took it for a ride around the block and I can feel a huge difference, it sets me back in the seat extremely hard on the top end. Overall I'm extremely impressed with this mod, especially for the price I got it for 