Boost Monkey 3.5mm ID Silicone Vacuum Hose for BMW — 10ft Black, OEM-fit, Heat-Resistant

Boost Monkey's 3.5mm ID silicone vacuum hose is a 10-foot replacement line built to match BMW part #117312599965 for reliable vacuum and boost routing.

This high-grade silicone hose provides a direct-fit alternative to the OEM vacuum line, engineered for flexibility, heat resistance, and long-term durability in BMW applications. With a 3.5mm (9/64") inner diameter and a 10-foot length, it gives you enough material to repair, reroute, or custom-fabricate vacuum runs without compromising flow or performance. The black silicone construction resists cracking, hardening, and degradation from engine heat and common automotive fluids.

How does this hose match the BMW part it replaces?

The Boost Monkey hose is sized to mirror the critical dimensions of BMW part #117312599965 so it installs cleanly on the same fittings and vacuum ports. Its inner diameter and flexible wall thickness are chosen to maintain proper vacuum characteristics and fitment.

• Exact 3.5mm (9/64") inner diameter for OEM-style connections
• Compatible with the same barb and clamp fittings used on the original part
• 10-foot length to cover multiple runs or custom routing

What material advantages does silicone offer for vacuum lines?

Silicone combines flexibility with resistance to heat, ozone, and many automotive fluids that degrade standard rubber hoses. That resilience reduces the chance of leaks, hardening, or splitting over time—especially under repeated thermal cycling in the engine bay.

• Higher heat tolerance than typical rubber vacuum lines
• Improved resistance to oil mist, coolant exposure, and ozone
• Maintains pliability across a broad temperature range for easier routing and secure clamps

How do I install and use a 10-foot replacement vacuum hose?

Installation is straightforward: measure the required run, cut the hose to length with a sharp blade, slide the hose onto the vacuum port, and secure with an appropriate clamp or spring clip. Trim carefully to ensure clean ends and a snug connection; reuse factory clamps only if they remain in good condition.

• Measure twice and cut once—use sharp shears for clean edges
• Use worm-drive clamps or spring clamps sized for 3.5mm ID fittings
• Inspect mating ports for damage and clean surfaces before assembly

Will this hose work for custom or performance vacuum setups?

Yes—the 10-foot length and consistent inner diameter make it suitable for repairs, rerouting, or building custom vacuum lines in aftermarket and performance projects. It’s a practical choice when you need durable hose material that won’t significantly alter vacuum flow characteristics.

• Long length gives flexibility for custom routing and splicing
• Uniform ID helps preserve expected vacuum response
• Black silicone blends with engine bay aesthetics while remaining functional

Who this is for: This Boost Monkey replacement hose is aimed at BMW owners, mechanics, and performance enthusiasts who need a reliable, OEM-comparable vacuum line. It's ideal for those repairing aged or cracked factory hoses, fabricating new vacuum runs for aftermarket components, or maintaining tight, leak-free connections in the engine bay. If you want a long, flexible silicone hose with the exact 3.5mm inner diameter that matches BMW part #117312599965, this 10-foot Boost Monkey line is designed to meet those needs without unnecessary modification.