ECS BMW Intake Boots & Hoses for BMW F86 X6 M S63 4.4L

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The intake boot provides a pathway for air from the air flow sensor to the intake manifold. On most BMWs the boot is made of rubber with an accordian shape that allows the engine to shift and vibrate. As with any rubber component the rubber can dry out and crack and that can lead to serious running and drivability issues. A crack in the boot means that air is entering the engine that is not being monitored by the airflow sensor. The engine computer relies on data from the airflow sensor to set the fuel mixture in the engine. Excess unmetered air can result in lean condition faults, rough running, misfires, and other performance issues. For misfire and lean condition faults, check your intake boots first.

As an alternative to the original rubber, we also offer silicone boots that are both stronger and last longer with a 4-layer silicone design. Samco silicone boots can also decrease your BMW's intake turbulence and restriction by replacing the accordian design with a smoothed internal surface. Samco boots are also perfect as part of a kit to eliminate the factory traction control system (sometimes called an ASC delete boot).
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Universal Throttle Body Coupler - 45 Degree 2.5" (63.50mm) ...
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T#:382969
Part#: 003402ECS03A-16
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$ 22.79 USD
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$ 22.79 USD
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Elevate your BMW project with ECS Tuning silicone couplers and elbows, providing a high-quality, precision-engineered solution for various applications. Whether you're installing an intercooler, fabricating a custom intake system, or pursuing other automotive projects, ECS Tuning delivers reliable performance and durability. Trust ECS Tuning to meet your needs and enhance your BMW project.

  • High-quality silicone couplers and elbows for BMW projects
  • Precision-engineered for reliability and performance
  • Versatile solution for intercooler installations, custom intake systems, and more
  • Ensures durability and longevity for your automotive projects
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Plastic Vacuum Tubing Kit - black - 8 Feet
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T#:360488
Part#: 5097T321-8FT-A
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$ 25.19 USD
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Sale - Save 30% $ 35.99
$ 25.19 USD
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Ensure optimal engine performance with the replacement of your vacuum system hoses. The vacuum system plays a crucial role in the engine's functionality, transforming it into an efficient pump that influences air-fuel mixture and combustion. Damaged vacuum hoses can lead to various performance issues, from rough idle to difficulties starting the engine. If you're experiencing these issues, it's time to upgrade to this plastic hose with a 2.3mm inner diameter. The hose is black, arrives in an 8-foot section, and can be easily cut to the desired size for a perfect fit.

Key Features:

  • Engine Optimization: Replacing old hoses ensures the vacuum system operates at peak performance.
  • 2.3mm Inner Diameter: Designed to meet specific engine requirements.
  • Black Color: Blends seamlessly with the engine components.
  • 8-Foot Section: Provides flexibility to cut the hose to the required length.
  • Easy Installation: Upgrade without hassle for improved engine efficiency.

Upgrade your vacuum system with this high-quality plastic hose, addressing performance issues and ensuring your engine runs smoothly.

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12.0" 3.75mm (5/32") ID Black Silicone Vacuum Hose ...
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T#:19825269
Part#: 2101
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$ 19.19 USD
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$ 19.19 USD
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Silicone Coupler - Straight 3" (76.20mm)
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T#:376702
Part#: 003402ECS01A-06
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$ 17.39 USD
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$ 17.39 USD
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Silicone Coupler - Straight 3" ID (76.20mm) x 3" L

No matter the project, ECS Tuning silicone couplers and elbows offer a high-quality, precision-engineered solution to your needs. Whether you're installing an intercooler, fabricating a custom intake system, or whatever else you can dream up, ECS Tuning has you covered.

  • High-quality silicone construction for durability
  • Precision-engineered design ensures a perfect fit
  • Versatile solution for various automotive projects
  • Enhances performance and reliability
  • Compatible with BMW and other vehicles
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BMW & MINI Silicone Coupler - Straight 2.38" (60.33mm) ...
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T#:376708
Part#: 003402ECS01A-03
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$ 17.39 USD
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Sale - Save 40% $ 28.99
$ 17.39 USD
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Upgrade your BMW or MINI with the BMW & MINI Silicone Coupler - Straight 2.38" (60.33mm). This high-quality silicone coupler is designed to provide a secure and leak-free connection for your vehicle's intake or cooling system. Engineered for durability and flexibility, it ensures optimal performance under various conditions. With its straight design and precise dimensions, this silicone coupler offers easy installation and a perfect fit for your BMW or MINI.

  • Provides a secure and leak-free connection
  • Engineered for durability and flexibility
  • Straight design for easy installation
  • Perfect fit for BMW and MINI vehicles
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46.5mm To 61.0mm Silicone Coupler - Each
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T#:28570863
Part#: 017623ECS08A
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Sale - Save 40% $ 30.99
$ 18.59 USD
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$ 18.59 USD
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For optimal performance, consider the 46.5mm To 61.0mm Silicone Coupler.

Engineered with durability and functionality in mind, this silicone coupler provides a reliable connection for various components in your vehicle's intake or cooling system. Its smooth interior surface promotes efficient airflow, while its flexible and reinforced construction ensures a secure fit and prevents leaks. Enjoy hassle-free installation and enhanced performance with this premium silicone coupler.

  • Durable silicone construction
  • Smooth interior surface for efficient airflow
  • Flexible and reinforced design prevents leaks
  • Secure fit for reliable performance
  • Hassle-free installation
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Silicone Coupler - Straight 3 5/8" (92mm)
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T#:377483
Part#: 003402ECS01A-07
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$ 4.79 USD
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$ 4.79 USD
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ECS Silicone Coupler

Upgrade your BMW with the ECS Silicone Coupler. This straight 3 5/8" ID (92mm) x 3" L coupler is designed to enhance your vehicle's performance and durability. Crafted from high-quality silicone, it ensures long-lasting reliability and superior performance.

  • Enhances vehicle performance
  • Durable construction for long-lasting reliability
  • Specifically designed for BMW vehicles
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3" To 2.5" Silicone Coupler 3" Length
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T#:363896
Part#: 003402ECS04A-02
Ships on Sep 24, 2025
Sale - Save 15% $ 9.99
$ 8.49 USD
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Sale - Save 15% $ 9.99
$ 8.49 USD
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3" To 2.5" Silicone Coupler 3" Length

Enhance the performance and durability of your BMW or MINI with the 3" To 2.5" Silicone Coupler 3" Length. This silicone coupler provides a reliable connection between components, ensuring optimal airflow and reducing the risk of leaks. Engineered for durability and heat resistance, it withstands high temperatures and harsh conditions. Upgrade your BMW or MINI with this premium silicone coupler for improved performance.

  • Reliable connection for optimal airflow
  • Reduces the risk of leaks for enhanced performance
  • Engineered for durability and heat resistance
  • Fits both BMW and MINI models
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2.25" To 2.5" Silicone Coupler - Each
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ECS - Corporate Logo
T#:28570862
Part#: 003402ECS04A-03
Special Order: No Guaranteed ETA
Sale - Save 40% $ 28.99
$ 17.39 USD
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Sale - Save 40% $ 28.99
$ 17.39 USD
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Upgrade your intake system with the 2.25" To 2.5" Silicone Coupler.

Engineered for durability and performance, this silicone coupler is the perfect solution for connecting components in your vehicle's intake or cooling system. With a smooth interior surface and reinforced construction, it ensures optimal airflow and prevents leaks. Enjoy easy installation and a secure fit, thanks to its flexibility and precision design. Enhance your vehicle's performance and reliability with this high-quality silicone coupler.

  • Durable silicone construction
  • Smooth interior surface for optimal airflow
  • Reinforced design prevents leaks
  • Flexible for easy installation
  • Precision-engineered for a secure fit
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