I have 2012 Buick GS and purchased a Buick Regal Turbo Stage Kit Part no. 12653667. I've had the kit installed by local Buick Dealer. Love the results etc of adding on the kit. With the addition of this kit I expected a little more
possibly acceleration noise but I did not expect the hear an annoying sort of grinding noise. I brought it to the attention of the dealer and their reply was that this is normal and is the sound of the air being taken in by the
system. I can't imagine GM making a kit specifically designed for my vehicle that would make this annoying sound. Has anybody else had the same it installed and experienced a similar problem OR would this be a normal
result of a installation like this.