These Black Mamba turbo blankets fit without any modifications around the turbos of the BMW 1M / 135i E82 and 335i E9x, isolating the engine and intake from thermal radiations emitted by the turbos. Constructed from Calcium Magnesium Silicate and Carbon fibers, these blankets are designed to withstand extreme temperatures, ensuring efficient heat management.Direct bolt-on 2-piece kit Calcium Magnesium Silicate and Carbon construction Stainless steel rivets and fasteners Installation hardware included Fits OEM or hybrid turbos (VTT / Pure / TTE, etc.) Lifetime warranty.