●Fit most of T4 turbocharger. Keep crucial engine components protected from the heat of the turbo. ●Inner side is made of high silica cloth and there is a layer of stainless steel net on the inner side, Outer is made of basalt titanium. Underside made of high quality silica fiber. ●Withstands 1800F direct/2500F intermittent heat. ●Protect and prolong the car engine components and give a boost in horse power. It helps the turbo spool faster. ●If you are not satisfied, we will give you a full refund or replacement