bekelan 4" ID Silicone Coupler 3" Long — 4-ply High-Temp Straight Hose, 150 PSI Rated

Bekelan 4-inch ID silicone coupler is a 3-inch long, 4-ply reinforced high-temperature straight hose designed to join 4" intercooler, intake, or turbo charge pipes while resisting wide temperature swings and high pressures.

This straight silicone coupler from bekelan pairs a reinforced four-ply construction with stainless T-bolt clamps to create a durable, flexible connection for turbocharged and supercharged intake systems, intercooler piping, and many industrial air or coolant lines. Built to withstand extreme temperatures from -76°F to 500°F and rated for working pressures up to 150 PSI, the coupler provides a reliable flexible joint where rigid piping would otherwise transmit vibration or stress.

How does this coupler hold up under heat and pressure?

The bekelan coupler uses high-temp silicone inner and outer layers with polyester reinforcement to maintain integrity across a broad operating range. It’s engineered for continuous use in demanding intake and intercooler environments where temperature cycling and pressurization occur.

• Rated operating temperature: -76°F (-60°C) to 500°F (+260°C)
• Working pressure range: 43.5–150 PSI (0.3–1 MPa)
• Burst pressure tested to 290 PSI (2 MPa)
• 4-ply reinforcement and 5 mm wall thickness for strength and shape retention

Will this fit my piping and how do I choose the right size?

The coupler has a 4.0" (102 mm) inner diameter and an approximate outer diameter of 4.4" to accommodate typical 4" OD charge pipes. Its 3" (76 mm) overall length offers a short, straight join suitable for tight spaces or where minimal sleeve length is preferred.

• Inner diameter (ID): 4.0 inches (102 mm)
• Outer diameter (OD): ~4.4 inches
• Overall length: 3 inches (76 mm)
• Includes two stainless T-bolt clamps—measure mating pipe OD before ordering

What applications are appropriate and what should I avoid?

Use this bekelan silicone coupler for air and coolant paths in automotive and industrial setups: turbo charge piping, supercharger inlets, intercooler joins, and non-aggressive fluid lines. It is not formulated for fuel or oil transfer—do not use where direct contact with gasoline, diesel, or engine oil is expected.

• Suitable media: air, water, coolant, antifreeze, steam, weak acids/alkalis (verify compatibility)
• Typical uses: turbo and supercharger plumbing, intercooler and intake piping, industrial air lines
• Not for: fuel or oil transfer
• Recommended to check pressure, temperature and chemical specs for your system

Who is this for: The bekelan 4" straight silicone coupler is aimed at DIY mechanics, tuners, performance shops and industrial technicians who need a short, heavy-duty flexible connector for 4" piping. It suits owners modifying turbo or supercharged setups, fabricators assembling custom intake or intercooler runs, and maintenance staff replacing worn couplers in high-temperature or pressurized air/coolant circuits. If you need a compact, reinforced silicone sleeve that includes stainless T-bolt clamps and performs across extreme temperature ranges, this coupler is a practical choice—just confirm pipe diameters and media compatibility before installation.