Internal Support Spring for -12AN Flexible Hoses

The Internal Support Spring for -12AN Flexible Hoses from Vibrant Performance is an essential reinforcement component designed for high-performance fuel, coolant, and vacuum line systems in modified and racing vehicles. This spring-loaded support structure prevents hose collapse, kinking, and vibration-induced fatigue at critical pressure points, particularly in -12AN (3/4-inch) diameter applications where fluid dynamics demand reliable flow consistency. Whether you're building a turbocharged engine bay, upgrading fuel delivery for a carbureted conversion, or securing vacuum-operated accessories, this internal support spring protects your hose investment and system reliability.

The internal design works by maintaining consistent inner diameter throughout the length of the hose run, counteracting the inward pressure that flexible hoses experience under negative pressure or high-velocity fluid movement. The spring mechanism flexes with the hose while preventing deformation—a critical feature in forced induction systems where fuel surge or coolant cavitation can otherwise compromise line integrity. Engineered to integrate seamlessly with -12AN hoses, this compact component (approximately 5.5 inches in length) slides inside the hose to provide structural reinforcement without restricting flow or adding significant weight (0.11 lbs). The design is compatible with both fuel and non-flammable fluid applications typical in street and competition automotive setups.

Mechanics and engine builders rely on internal support springs when fabricating custom hose runs in tight engine bays or when routing lines through high-vibration zones where external clamps alone cannot prevent damage. This is particularly valuable in turbocharged applications, supercharged systems, and carb fuel setups where pressure spikes and vacuum fluctuations are routine. Installation requires inserting the spring inside the -12AN hose before connection to fittings; the spring naturally conforms to the hose ID while maintaining its support function. Order the Internal Support Spring for -12AN Flexible Hoses to extend hose lifespan, reduce the risk of pressure-related leaks, and ensure system stability in demanding automotive environments.