Im having a hard time finding out which regulators have boost comp and which dont. My problem is that when my car was first tuned with the SCT chip I had a non-comp MAC knock off reg. on the car. Well it started to leak a little so I replaced it with an aeromotive reg. that has a 1:1 boost comp. Now my power from 5000 rpms on up is being killed because my AFR goes way past 10:1 buy 5200 rpms. My tuner said there is alot of power left in it but doesnt want to tune with the current reg. I have now. He said it actually works against the SCT programming. He said that with the 42lb. inj. and my 190 pump I have more than enough fuel without boosting the pressure. So without going back to a stock reg. who makes one without boost comp built in.