Supertech Performance SPRK-MC56BE-G4FJ-2 Beehive Valve Spring Kit - 75lbs 33.5mm

The Supertech Performance SPRK-MC56BE-G4FJ-2 is a precision-engineered beehive valve spring kit designed for high-performance engine builds requiring enhanced valvetrain stability and reliability at elevated RPMs. This complete kit provides everything needed for a comprehensive valvetrain upgrade on Hyundai and Kia applications equipped with the G4FJ 1.6L turbocharged engine.

Premium Construction and Engineering:

• Manufactured from Superclean Chrome Silicon Vanadium steel alloy for exceptional fatigue resistance and durability under extreme conditions
• Computer-designed spring geometry ensures wire stress levels remain within optimal fatigue limits for long-term reliability
• Advanced harmonic control engineering prevents valve float and maintains consistent performance at high engine speeds
• Gas nitriding process followed by shot peening treatment enhances surface hardness and extends service life
• Beehive spring design reduces valvetrain mass while maintaining superior control characteristics

Performance Specifications:

• Seat pressure: 75 lbs @ 33.5mm installed height
• Open pressure: 172 lbs @ 10mm lift
• Maximum valve lift: 10mm
• Coil bind: 22.2mm
• Outer spring inner diameter: 16.5mm
• Outer spring outer diameter: 23.5mm

Complete Kit Includes:

• 16 beehive valve springs (SPR-MC56BE)
• 16 titanium valve spring retainers
• 32 valve locks (KPR-5.5-7A-ST)

This valve spring kit is essential for engines operating above 7,000 RPM or running aggressive camshaft profiles. The combination of premium materials, precision manufacturing, and computer-optimized design delivers the performance advantage needed for street, drift, and racing applications. CNC-machined military-grade titanium retainers reduce reciprocating mass and ensure precise valve control throughout the RPM range.