Thickened oil-resistant rubber adapts to the high-temperature operating environment of diesel engines, solving common diesel intake collapse and leakage problems. Significantly improves cold air inflow efficiency, can withstand continuous high-temperature operation at high RPMs in racing cars, optimizing throttle response and peak horsepower output. For 335i xDrive 2009 2010 2011 2012 2013,Material:Rubber,Main function: the inlet hose of the air filter is equipped with a better air filter function that can be used in your engine system, so you can use it with confidence. Package Quantity:1 Pcs Air Intake Hose, MATERIALS - This air filter suction hose is made of high quality materials, is compressible, super sturdy and durable, long service life. Can ensure that there is a flow area to avoid turning and sudden changes of the cross-section, and improve the surface texture of the tube to reduce air resistance., Manufacturer: KJHOPY