Light By-Pass Spring

The Light By-Pass Spring (MP-8050-04) from Magnafuel/Magnaflow Fuel Systems is a precision bypass valve spring engineered to regulate fuel pressure in high-performance fuel pump assemblies. This 0.041-inch wire diameter steel spring serves as a critical pressure control component, maintaining system integrity across varying engine loads and operating conditions. The bypass spring is an essential wear and replacement item for maintaining consistent fuel delivery in fuel pump systems that rely on pressure-regulated bypass mechanisms.

Constructed from durable steel with a 0.041-inch wire diameter, this spring is designed to withstand repeated compression cycles without permanent deformation or fatigue failure. The compact dimensions (3.05 x 0.45 x 3.8 inches) and minimal weight (0.02 lbs) ensure seamless integration into fuel pump housings without adding bulk. When properly installed, the bypass spring maintains consistent pressure relief settings, preventing dangerous fuel system over-pressurization while ensuring adequate fuel flow to the engine during peak demand. Replacement springs are necessary when original springs lose tension, a condition that results in fuel pressure drift and inconsistent pump behavior.

This spring is intended for technicians, fuel system specialists, and performance engine builders maintaining or rebuilding Magnafuel fuel pump assemblies. It is commonly used in street performance applications, race fuel systems, and fuel pump restoration work where original or worn springs require replacement. Vehicle owners and shops addressing fuel pressure issues or conducting routine pump service rely on quality replacement springs to restore proper system function.

Magnafuel fuel pump systems are widely recognized in the automotive aftermarket for high-flow capacity and pressure regulation reliability. Proper bypass spring selection and installation is fundamental to maintaining the fuel delivery characteristics these pumps are designed to provide. Having the correct replacement spring on hand ensures minimal downtime during service and prevents temporary use of worn components that compromise system performance.