Gen2 Ford Raptor IWE Silicone Vacuum Line Kit — Fix 4WD Grinding Noise (2017–2020 Ford Raptor)

The most common cause of front wheel grinding on a Gen2 Raptor isn’t the hubs. It’s a vinyl vacuum line.

Ford’s Integrated Wheel End (IWE) system uses vacuum to disengage the front hubs during 2WD driving. On the Gen2 Raptor — 2017 through 2020 — the system runs a combination of rubber and vinyl lines through the engine bay. The rubber dual-lumen line generally holds up. The vinyl single runs and plastic tee connector don’t. They crack, harden, and split from heat cycling and age, bleeding vacuum and causing the hubs to partially engage.

That’s the grinding noise. That’s the ratcheting sound at highway speed. That’s the noise that makes Gen2 owners think their front end is falling apart.

It isn’t. The vinyl lines just need to go.

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✅ Before you order — diagnose first:

Vacuum leaks in the IWE lines are the most common cause of hub grinding on the Gen2 Raptor, but not the only one. Before ordering, verify vacuum integrity at the IWE actuator and check valve. If vacuum holds at those components, the lines and tee are your culprit and this kit fixes it permanently. If the actuator or check valve itself has failed mechanically, those components need to be addressed separately.

Diagnose first. Buy with confidence.

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✅ The Infinity Overland Solution

Every other IWE kit on the market uses generic rubber or vinyl lines — the same material that’s already failing on your truck. Some use generic silicone hose cut to length. Neither is purpose-built for this application.

The Infinity Overland kit uses a custom dual-lumen VMQ silicone extrusion — tooled specifically to Ford’s IWE routing specifications. Correct bore diameter. Correct wall thickness. Correct lumen spacing. Paired with a solid machined brass tee connector that replaces the factory plastic fitting permanently.

This is the only full silicone IWE kit on the market. Not a workaround. A replacement.

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✅ VMQ Silicone — built for underhood abuse:

The Gen2 Raptor runs a high-output 3.5L EcoBoost — an engine that generates serious underhood heat. The IWE system runs directly above the exhaust manifold. Temperature matters more here than almost anywhere else under the hood. VMQ silicone handles –58°F to +482°F continuous. It won’t harden, crack, or collapse under heat cycling. Ozone and UV resistant. Install it once and forget about it.

Factory vinyl lines are a ticking clock. VMQ silicone isn’t.

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✅ Installation

• Straightforward replacement following the path of the factory lines. No modification required. If you can change a hose, you can install this kit. Typical install time 30–45 minutes.

  1. Locate the factory IWE vacuum lines running to the front hubs
  2. Remove the original vinyl and rubber vacuum lines
  3. Install the silicone replacement lines following the factory routing path
  4. Verify vacuum operation and confirm hub disengagement

  No special tools required. Full installation instructions included.

Optional tools that can make the removal of brittle factory lines easier:

• Fir-tree removal tool (also useful for panel fasteners) – View on Amazon

• Flush cutters for zip ties – View on Amazon

(Tools are optional but will make your life much easier — no special tools are required.)

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✅ Fitment

• Fits 2017–2020 Ford Raptor (Gen2) equipped with vacuum-operated IWE hub system.

  ⚠️ This kit is for vacuum-operated IWE systems only. Gen3 Raptor (2021+) uses an electronic hub system and is not compatible. If you own a Gen1 Raptor (2010–2014) see our Gen1 Raptor IWE kit. If you own a standard F-150 see our F-150 IWE kit.

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✅ What’s Included

• Custom VMQ silicone dual-lumen vacuum lines — rated to 392°F continuous
• Solid brass tee connector — replaces factory plastic split fitting
• OEM-style retention clips — routes and mounts exactly like factory
• Complete hardware — everything needed, nothing extra required

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Important Note

While vacuum line failure is the most common IWE problem, damaged hub actuators or a failing vacuum solenoid can also cause similar symptoms. Replacing vacuum lines first is the correct diagnostic step and often prevents unnecessary replacement of expensive IWE components.

(For full diagnosis and repair order, see our Ford IWE Problems & Fix Guide.)

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Fix the most common failure first.

Restore proper IWE operation.

Stop chasing vacuum leaks for good.