4 Ply Hump Hose 4.5in I. D. x 3in long - Black

The 4 Ply Hump Hose 4.5in I.D. x 3in long in black from Vibrant Performance is a precision silicone tubing coupler engineered for custom automotive cooling, intercooler, and boost systems. This straight hump design is essential for builders and enthusiasts who demand reliable connections between hard-line and flexible ducting in high-performance engine bays. The hump profile provides structural support while maintaining smooth internal flow, making it ideal for turbocharged, supercharged, and naturally aspirated engine builds where vibration isolation and thermal stability are non-negotiable.

Manufactured from premium 4-ply reinforced silicone, this coupler combines durability with heat resistance across the full operating range of modern forced-induction systems. The 4.5-inch inner diameter accommodates substantial volumetric flow rates without restriction, while the 3-inch length provides compact integration in tight engine compartments. The reinforced multi-ply construction resists collapse under vacuum and withstands positive boost pressures, ensuring consistent performance whether you're running mild street boost or aggressive track power. The black silicone finish resists UV degradation and maintains flexibility across temperature extremes, eliminating the brittleness common in inferior rubber alternatives.

Serious builders—from twin-turbo LSx swaps to LS1 intercooler manifolds—rely on Vibrant Performance couplers for OEM-grade reliability in custom applications. The straight hump geometry works seamlessly with 4.5-inch diameter silicone hose, mandrel-bent aluminum piping, and factory air-intake ducting. Installation is straightforward with standard hose clamps; ensure clamp placement avoids the reinforcement ribs for maximum seal integrity. Compatibility spans carbureted, fuel-injected, and turbo platforms where thermal and pressure stability demand industrial-grade silicone rather than standard rubber.