KDP 3.5in ID Silicone Hump Hose Coupler with 2 Clamps — 4in Length, 4-Ply Reinforced, 150 PSI, 350°F

Overview

The KDP 3.5in ID Silicone Hump Hose Coupler is built for demanding piping layouts where a reliable connection matters. It features a 3.5 inch inner diameter, a 4 inch overall length, and a 5 millimeter wall with four-ply reinforced silicone blend. This design balances stiffness with essential flexibility, supporting heavy-duty applications while minimizing unwanted movement under pressure.

Rated for up to 150 PSI and temperatures up to 350 degrees Fahrenheit, this coupler is suited to high-temperature, high-flow environments commonly encountered in performance cooling and intake routing. The package includes two heavy-duty clamps, so you have a ready-to-install solution without the need to source additional hardware.

• Inner diameter: 3.5 inches; clamps included
• Coupler length: 4 inches to provide proper tube engagement and a robust clamping area
• Wall thickness: 5 mm with four-ply heat-resistant embedded fibers for reinforced durability
• Max pressure and temperature: 150 PSI at up to 350°F (177°C)
• Universal fit: ideal for straight intake hoses, radiator hoses, intercooler pipes, and similar straight connections

Why choose this coupler

In challenging engine bays, silicone maintains flexibility while the reinforced fibers resist sag and wear. The 4-inch engagement creates a solid contact area with standard hoses, helping to maintain a secure seal across varied operating conditions.

• Durable, high-temp performance suitable for demanding setups
• Includes heavy-duty clamps for quick, tool-free installation

Real-world uses

Use this coupler when routing straight hoses in turbocharged or high-performance builds, during cooling system reconfigurations, or when upgrading intercooler piping in tight spaces. It offers a practical balance of strength, flexibility, and ease of use without promising specific results.

Installation tips

Verify the hose ID before installation. Clean mating surfaces, slide on the coupler, and tighten the included clamps evenly to achieve a uniform clamp load. Allow for slight expansion and movement under pressure.