The vidoe clips have nothing on the true sound of this system. Even with the HFC's and 18" CF resonators it's not overly loud. The down shifts are amazing. I agree with the above post, a little Raamat and some ensolite foam will make this the perfect system. Link to Raamat and ensolite below.
The Goods
The sound reduction material is really only needed for the "Lexus" type sensitive ears out there.