Reduces Under Hood Temp Increasing Life Of Hoses/Harnesses,Retains Internal Turbine Housing Temp For Lower Spool Times,Custom Fit For Borg Warner T4 S300/S400,Fits Most Similar Size Garrett And Holset Turbo Applications,12 Months or 24000 Mile Warranty,Cooler Engine Comp Temps Result In High Density For More Pwr,Stylized Look With Custom BD Embroidery