Custom 1.5 to 1.25 3.5"-2.75"/2.5"-3" Pipe Reducer Intercooler Silicone Turbo Hose Couplers. Customizable Design: OEM/ODM services available with 3D design and production from customer drawings. High-Quality Materials: Constructed with 100% organic silicone, reinforced with 4-ply polyester, aramid, or glass fiber. Multiple Color Options: Available in Black, Red, Blue, Green, and Yellow. Eco-Friendly and Safe: Non-toxic, odorless, and offers good electrical insulation properties. Free Sample Availability: Customers can request free samples prior to placing an order. Versatile Applications: Suitable for heating/cooling systems, turbochargers, intercoolers, and compressor systems. Extensive Size Range: Available in various I.D. sizes from 19mm to 150mm with 3 or 4-ply options.