I will go with cubes on the no bov very good on gear changers my car cherps 3rd and 4th now and with the horrible jerky driveability issue when changing gears at part throttle and low rev's and the odd stall none of that happend it stoped the stalling and the on the freeway before the bov was allways open a litle bit and also the sound (fluter) is much better. ps my boost is at 12psi