This Turbo sock fits most aftermarket wastegated S300 Turbos (II PhatShaft, HTT, BD) and comes with 2 stainless steel ties for installation. * Faster Spool Up. * Lower underhood temps. * Cooler Intake air temps. * Lower exhaust gas temps. * Fast Install, usually less than 15 minutes. * Will not become brittle, stays soft and pliable even after years of use. * 3 full layers, top and bottom layers of silica cloth. Middle layer of 1/2" thick silica insulation. Rated at 1800 degrees continuous and ability for short excursions to 3000 degrees.