Upgrade your Honda B-Series valvetrain with the Supertech SPRK-H100DR-ST Dual Valve Spring Kit. Designed for turbocharged, high-RPM, and high-performance engine builds, this kit combines Supertech's proven dual valve springs with durable hardened steel retainers to provide improved valve control under demanding operating conditions.

Engineered for performance applications, the SPRK-H100DR-ST features 85 lbs of seat pressure at 33.5 mm and 210 lbs of open pressure at 10 mm lift, helping reduce valve float and maintain stable valve operation at elevated engine speeds. This kit includes 16 dual valve springs and 16 hardened steel retainers, making it an excellent choice for street, track, and forced induction B-Series builds where the added durability of steel retainers is preferred.

Features

• Supertech Dual Valve Spring Kit with Hardened Steel Retainers
• Part Number: SPRK-H100DR-ST
• Designed for Honda B-Series DOHC VTEC engines
• Includes 16 dual valve springs and 16 hardened steel retainers
• 85 lbs seat pressure at 33.5 mm installed height
• 210 lbs open pressure at 10 mm valve lift
• Provides improved valve control for high-RPM and turbocharged applications
• Helps minimize valve float during aggressive camshaft operation
• Precision-manufactured for consistent spring pressure and long service life
• Ideal for performance street, road race, autocross, and forced induction engine builds
• Compatible with Supertech performance valvetrain components and many aftermarket camshafts
• Professional installation and proper spring height verification are recommended