Black High Temp 3-Ply Reinforced Silicone Coolant Cap Bypass Heater, Three Eighths Inch Nine Point Five Millimeter Size, 1-1/2 Inch Length, 4mm Wall, Max 350 Fahrenheit, Heavy-Duty Bypass for Coolant Water Air and Turbocharger Systems

Single Cap: High-Temp Reinforced 3-Ply Silicone Cap
✔️ ID 3/8 in (9.5 mm), 1.5 in long, 4 mm wall, 350°F max, 3-ply silicone

The heavy-duty bypass cap is designed to seal off or bypass ports in cooling systems. It's typically used on coolant lines, vacuum ports, heater cores, and turbocharger bypass paths in engines and performance setups.

✅ Inside diameter: 3/8 in (9.5 mm)
✅ Overall length: 1-1/2 in (38.1 mm)
✅ Wall thickness: 4 mm (0.157 in)
✅ Max temperature: 350°F (177°C)

💡 What is a high temperature reinforced silicone cap used for in cooling systems?

It's handy for sealing ports and bypassing paths in engine cooling and turbo setups.

- Handy for sealing ports on coolant lines and bypass paths
- Compatible with coolant, water, air, vacuum ports, heater cores
- Rated to 350°F (177°C) in typical engine bay use
- UV and ozone resistant for outdoor mounting