Skunk2 311-05-1350 Alpha Series Valve Spring Set for 1990-2001 Acura Integra

Vehicle Fitment

• 1990-2001 Acura Integra (all trims - 1.7L/1.8L B17/B18 DOHC VTEC)
• 1999-2000 Honda Civic Si 1.6L B16A DOHC VTEC
• 1994-1997 Honda Civic del Sol VTEC 1.6L B16A

Features

• Alpha Series dual-valve springs built from chrome-silicone wire for high-RPM valvetrain stability
• Seat pressure: 68 lbs at 1.320" height - ensures proper preload under high rev conditions
• Open pressure: 210 lbs at 0.820" - prevents valve float at elevated RPMs
• Coil bind height: 0.800" - provides clearance margin for performance use
• Optimized for engines exceeding 10,000 rpm - offers enthusiast-level valvetrain reliability
• Designed for B-Series VTEC heads in Integra/Civic platforms with aggressive cam or forced induction use
• Ideal companion for performance camshafts and valvetrain upgrades; requires verifying compatibility with head & spring seat dimensions
• Not universally compatible with all camshaft profiles - ensure matching specification with cam and head build

Specifications

• Part Number: 311-05-1350
• Seat Pressure: 68 lbs at 1.320" installed height
• Open Pressure: 210 lbs at 0.820" installed height
• Coil Bind Height: 0.800"
• Spring Set Includes Dual-Inner/Outer Configuration (16 springs per set for 4-cylinder head)
• Engine Compatibility: Honda/Acura B-Series DOHC VTEC - B16A, B17A1, B18C1, B18C5
• Recommended for high-rev, modified valvetrain applications; not a direct stock replacement for mild builds

Included Components

• 16 x Valve springs (Dual-inner + outer design)

Product Description

The Skunk2 Alpha Series Valve Spring Set (part 311-05-1350) is engineered for high-performance Honda/Acura B-Series VTEC engines, covering the 1990-2001 Integra and 1999-2000 Civic Si / del Sol platforms. These springs deliver the high seat and open pressures required when running aggressive cams or high-revving builds, providing excellent resistance to valve float at rpm above 10,000.

Built from super-clean chrome-silicone wire and manufactured with dual-spring (inner and outer) architecture, these valve springs maintain valvetrain stability under extreme conditions. Installation demands precise spring seat height, correct head clearance, proper retainers, and matching cam timing to maximize performance and reliability.

Fitment is confirmed for the listed years and models. **Fitment confirmed through 2001. 2025 coverage unconfirmed at time of listing.** Always verify your engine code (B16/A, B17/A1, B18/C1/C5), head casting, cam profile, and compatibility with your specific build before purchase and installation.