The Turner Upgraded Silicone Lower Air Intake Pipe provides improved turbo response, increased airflow, and less turbo lag. This silicone upgrade is a direct replacement for the OE brittle plastic air intake pipe. BMW uses cheap plastic intake pipes that are known to quickly deteriorate and crack, or even worse explode under high stress. This is the lower plastic lower intake pipe, commonly referred to as the “Turbo Inlet”, part number 13717605638. This pipe runs directly from the turbo to the plastic upper intake pipe. The upgraded silicone intake pipes are designed with a smooth contour for unobstructed flow compared to the OE molded plastic. By eliminating the restrictive muffler in the OE intake tube, this allows for more of the “intake noises”, such as turbo spool or the BOV.

Turner Air Intake Pipes sport a two-piece modular design, this allows you to run either this lower intake pipe (Turbo Inlet - From Turbo to Intake Pipe - ES4057664), the upper intake pipe (Intake Tube - From Turbo Inlet to Factory Airbox - ES4057673), or both (ES4057527) for maximum performance. By eliminating the restrictive muffler in the OE upper intake tube, this allows for more of the “intake noises”, such as turbo spool or the BOV. The lower intake tube utilizes 6061-T6 black anodized adapters connecting the silicone intake tube to the PCV hose, vacuum line, and the turbo inlet. The 6061-T6 adapters provide a more secure and durable connection than the OE plastic tube.

Both Tubes are Constructed of 5-Ply reinforced silicone for improved durability. Silicone offers reduced thermal conductivity for improved performance, as well as improved resistance to ozone and UV degradation for improved durability.

Features:

• Increased turbo response, increased airflow, less turbo lag.
• ​Designed with a smooth contour for unobstructed flow compared to the OE molded plastic.
• Two-piece modular design allows the customer to run either the upper intake tube, the lower intake tube, or both for maximum performance.
• Constructed of 5-Ply reinforced silicone for improved durability.
• ​6061-T6 adapters provide a more secure and durable connection than the OE plastic tube.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.