An electronic booste controler will solve your problems. you will see less lag and more power down low. I to used a manual controller until i bought my profec B. I gained 80 HP in spots just using this booste controller. a manual booste controller just uses different size orifices to limit booste to the Waste gate act. where an electronic booste controller keeps teh wastegate shut until your preselected booste level is met then bam it opens and shuts to maintain it. If you have never used one you will not believe the difference. I didnt think it could make a difference but was drastically mistaken.