The factory rubber/plastic hoses become brittle and crack over time. Brittle and cracked hoses can cause multiple vacuum leaks that are impossible to repair without hose replacement. Vacuum leaks can cause many problems including rough running, missing, stalling at idle, and even a no-start condition.

The factory hoses offered through BMW are plastic and will yield the same results of becoming brittle and damaged over time. Turner Motorsport has created a solution with their silicone replacement that will outlast everyone of the OEM replacements. The Turner Silicone Crankcase Vent Hose can be used to replace the factory brittle hose to ensure your S54 is free from vacuum leaks and performing properly. Simply take your factory crankcase vent hose and remove the ends; the factory ends can be installed on the new Silicone Vent Hose with the supplied clamps for a tight seal.

CSL Vent Hose (11157833649) - Silicone Crankcase Vent hose is a direct replacement

Non-CSL Vent Hose(11157831311) - Silicone hose will make a "U" bend with direct fitment and can also be trimmed for your own preferable fit.

Key benefits:

• Lifetime replacement of the brittle OEM plastic crankcase breather hose that is susceptible to cracking overtime from constant heat cycling

Design:​

• “Black” 3 ply reinforced silicone w/ “White” Turner logo

• includes 2 German style 430 stainless worm-drive clamps for installation

Special care instructions:

• Do not overtighten hose clamps, hand tight is recommended.

• Carefully cut the OEM plastic casing from both plastic fittings for reuse