KDP 3.5-inch ID silicone hump hose coupler close-up for durable connections.
KDP coupler length view shows 4-inch engagement for a secure fit.
KDP 4-ply reinforced silicone detail highlights heat resistance and durability.
KDP 150 PSI and 350°F rating indicate high-temperature performance.
KDP universal application for straight intake, radiator, and intercooler pipes.
KDP included heavy-duty clamps offer ready-to-install security.
KDP 3.5-inch ID silicone hump hose coupler close-up for durable connections.
KDP coupler length view shows 4-inch engagement for a secure fit.
KDP 4-ply reinforced silicone detail highlights heat resistance and durability.
KDP 150 PSI and 350°F rating indicate high-temperature performance.
KDP universal application for straight intake, radiator, and intercooler pipes.
KDP included heavy-duty clamps offer ready-to-install security.

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

OverviewThe KDP 3.5in ID Silicone Hump Hose Coupler is built for demanding piping layouts where a reliable...
Vendor: KDP
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KDP 3.5-inch ID silicone hump hose coupler close-up for durable connections.

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

£27.87
KDP 3.5-inch ID silicone hump hose coupler close-up for durable connections.
KDP coupler length view shows 4-inch engagement for a secure fit.
KDP 4-ply reinforced silicone detail highlights heat resistance and durability.
KDP 150 PSI and 350°F rating indicate high-temperature performance.
KDP universal application for straight intake, radiator, and intercooler pipes.
KDP included heavy-duty clamps offer ready-to-install security.

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

£27.87
Description
Description
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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.

FAQ

Q: What applications is the KDP 3.5in silicone hump hose coupler best suited for?

A: Best for straight intake, radiator, and intercooler pipes with a 3.5in ID.

Q: Are clamps included with this coupler?

A: Yes, two heavy-duty clamps are included for quick, secure installation.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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