Skunk2 311-05-1345 Alpha Series Valve Spring Set for Honda/Acura D-Series VTEC

Vehicle Fitment

• Honda/Acura D-Series SOHC VTEC engines (various D15/D16 models) - verify engine code before installation

Features

• Alpha Series dual-spring configuration using premium chrome-silicone wire for high performance durability
• Designed to prevent valve float and maintain valve-train stability at high RPMs (10,000 rpm+ applications)
• Seat pressure: 62 lb; open pressure: 158 lb (at specified lift) - engineered for aggressive cam profiles
• Optimised for performance builds with upgraded camshafts, valvetrain components and higher RPM targets
• Direct replacement for suitable D-Series engine valvetrain applications - drop-in design when matched with correct components
• Manufactured to high-precision standards including modern material science, CAD/FEA modelling and race-driven development
• Ideal for street, track or competition engines requiring stronger valvetrain control than stock springs

Specifications

• Part Number: 311-05-1345
• Spring Type: Alpha Series dual-spring set
• Seat Pressure: 62 lb
• Open Pressure: 158 lb
• Application: Honda/Acura D-Series SOHC VTEC engines (verify fitment)

Included Components

• 1x Set of valve springs (quantity as required for engine - typically full set for D-Series VTEC)

Product Description

The Skunk2 311-05-1345 Alpha Series Valve Spring Set is built for Honda/Acura D-Series SOHC VTEC engines where high RPM, aggressive cam profiles and performance demands exceed what stock springs can reliably support. With a dual-spring construction crafted from premium chrome-silicone wire, these springs are designed to control valvetrain motion, reduce risk of valve float and improve durability under heavy load or high-rev environments.

With seat pressure of 62 lb and open pressure of 158 lb, this kit is especially suited for builds using upgraded camshafts, higher ramp rates or performance tuning where valvetrain stability is critical. It allows enthusiasts and builders to push their D-Series engines harder while maintaining reliability and responsiveness.

Before installation, confirm that your engine is from the D-Series family, verify camshaft lift and geometry, confirm that your retainers, valves and springs are compatible, and that your machine work and clearances meet performance requirements. This valve spring set is designed for demanding applications and should be installed with correct valvetrain analysis and tuning consideration.