DIY autotune also sells them.

No, the MBC not the EBC, i have the gm ebc already

oh my bad. build your own.

boostcontrol

nice writeup, wish i had found that when i first started this project.

i followed the instructions in that link and had good results. i get absolutely no spike in high gear pulls, but i still get spikes when i shift, and the boost does drop off at high rpm.

I wish i had ordered this ceramic ball when i made my first purchase... McMaster-Carr

i think that it would help with response at high rpm

and i am sure that when i put anything other than the stock exhaust on the car, the boost drop issue will reverse it self and turn into creep.