Amando, if you are thinking about the original 'Home Depot Kit', using rubber hoses, you might be surprised to find that the tubing would actually shrink under vacuum, having the effect of restricting the incoming air, actually reducing boost. This was tested at the dyno, with consistent results on 3 different BBSC cars. I took mine off after finding a 5lb peak, and immediately went back to 6lbs... These are facts, not opinions.