5/16in (8mm) ID x 5 ft l ong Silicone Heater Hose

The VIBRANT PERFORMANCE 5/16 inch ID x 5 foot long silicone heater hose is a premium-grade coolant line engineered for high-temperature applications in automotive cooling systems. Constructed from reinforced silicone material, this hose delivers superior heat resistance and durability compared to traditional rubber alternatives, making it ideal for custom engine builds, performance modifications, and heavy-duty cooling system upgrades where standard hoses fail.

The 5/16-inch inner diameter accommodates moderate coolant flow rates typical of auxiliary heater circuits, overflow lines, and bypass applications in both naturally aspirated and turbocharged engines. At 5 feet in length, this hose provides flexibility for custom routing through engine compartments, allowing builders to optimize coolant pathways without multiple shorter segments. The black reinforced silicone construction resists degradation from sustained temperatures up to 350°F, preventing the cracking, splitting, and leakage that plague aging rubber hoses in high-performance applications. Wall thickness and braid reinforcement ensure the hose maintains its integrity under pressure cycling and vibration exposure common in track-driven or modified vehicles.

This hose is designed for enthusiasts and technicians building or restoring cooling systems in street rods, race cars, marine engines, industrial equipment, and heavy-duty trucks where OEM rubber hoses cannot meet performance demands. Its length and diameter make it particularly suited for heater return lines, bypass circuits, and auxiliary cooling feeds. VIBRANT PERFORMANCE is recognized in the automotive performance community for manufacturing silicone hose kits and individual segments that prioritize material quality and temperature reliability. The 5-foot length reduces the need for multiple connections, lowering leak points and simplifying installation on custom layouts.