Torque Solution Turbo Velocity Stack Shield For 4" InletTorque Solution Billet Turbo Velocity Stack Shield Applications: For 4" Inlet Torque Solution Billet Turbo Velocity Stack Shields are the perfect solution to keep your investment safe from rocks or large debris without being suffocated by a cone filter. Our velocity stack shields are a 1 piece design made from CNC'd 6061 T6 billet aluminum providing approximately a 1" tall horn and a slightly domed hex mesh screen. These not only function as intended,