Silicone Coupler Reducer 4.00" - 5.50" X 4.00"

🔥 4.00" to 5.50" Silicone Reducer Boot – 4.00" Long, 5-Ply High-Temp Reinforced for Diesel Boost Applications

This heavy-duty 4.00" ID to 5.50" ID silicone reducer boot is engineered for extreme boost, high heat, and the rigorous demands of diesel performance. With a 4.00" length and 5-ply reinforced high-temperature silicone construction, this boot provides unmatched strength, flexibility, and sealing power for custom intercooler, intake, and charge-air piping setups.

Ideal for compound turbo configurations, large-frame turbos, and high-flow intake systems—this reducer boot ensures a secure connection where it matters most.

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🔧 Key Features:

• Inside Diameter: 4.00" to 5.50"

• Overall Length: 4.00"

• 5-ply reinforced high-temp silicone for strength and durability

• Strength-tested to withstand high-boost diesel applications

• Resists heat, pressure, oil, and vibration in extreme environments

• Smooth interior finish for unrestricted airflow and easy installation

• Perfect for compound turbos, large intercooler setups, and custom fabrication

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📦 What’s Included:

• 1x 4.00" to 5.50" x 4.00" High-Temp Silicone Reducer Boot (Black)

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Built to handle the pressure—this reducer boot is the go-to solution for serious diesel and racing builds requiring reliable, high-flow connections.