The Mishimoto BMW E90/E92 with N52 Engine Black Silicone Intake Boot is a high-quality replacement part that is designed to replace the factory rubber intake boot on your BMW. This silicone boot is constructed from a combination of high-grade silicone and heat-resistant embedded fibers for increased durability, heat tolerance, and pressure tolerance. This intake boot is designed to provide a secure, tight seal between the intake manifold and the cylinder head, and can withstand temperatures up to 330°F. Additionally, this intake boot features a black finish for a sleek, stylish look.