Skunk2 Racing Ultra Valve Springs and Spring Base Kit

Honda K20C1/K20C4 2016–2023

Part #: 313-05-9100

Overview

The Skunk2 Racing Ultra Valve Springs and Spring Base Kit is designed for Honda enthusiasts seeking to maximize their engine's performance potential. Crafted with precision and engineered for durability, these valve springs are ideal for high-performance applications, especially when upgrading to high-lift camshafts. Whether you're building a street performance setup or preparing for track days, this kit ensures your engine's valvetrain remains stable under increased loads and higher RPMs.

Made from premium materials and subjected to rigorous manufacturing processes, the Skunk2 Ultra Valve Springs deliver consistent valve control, helping you achieve improved engine responsiveness, increased horsepower, and reliable long-term operation. This kit is perfect for those who demand the best in quality and performance from their Honda K-series engine builds.

Key Features

The Skunk2 Ultra Valve Springs are engineered with advanced materials and manufacturing techniques to provide superior performance and durability. Here are some of the key features:

• Constructed from super-clean, high tensile strength chrome-silicone wire for enhanced fatigue resistance and longevity.
• Shot peen stress relief process to improve spring stability and reduce the risk of fatigue failure during high-RPM operation.
• Heat-treated to optimize strength and resilience, ensuring consistent performance over time.
• Installed height of 1.450 inches, designed to fit OEM and aftermarket valve train components seamlessly.
• Seat pressure of 83 lbs and open pressure of 215 lbs, providing excellent valve control for high-lift camshaft profiles.
• Spring rate calibrated for optimal valve response and to support increased cam lift beyond OEM specifications.
• Spring coil bind at .926 inches, ensuring safe operation within the engine's valve travel limits.
• Compatible with Honda K20C1 and K20C4 engines, including models from 2016 to 2023.
• Designed for enthusiasts who want to push their engine's performance boundaries while maintaining reliability.

Construction & Design

The Skunk2 Ultra Valve Springs are meticulously manufactured from high-quality chrome-silicone wire, which offers excellent tensile strength and fatigue resistance. The shot peen stress relief process enhances the spring's stability, reducing the risk of coil fatigue during high-RPM operation. Heat treatment further refines the spring's mechanical properties, ensuring consistent performance under demanding conditions.

The springs feature a precise installed height of 1.450 inches and are engineered to provide a balanced combination of seat and open pressures. This design ensures optimal valve control, improved throttle response, and support for high-lift camshafts. The coil bind measurement of .926 inches guarantees safe operation within the engine's valve travel limits, preventing valve float or contact with the piston.

Overall, the construction and design of these springs reflect Skunk2's commitment to quality, durability, and performance, making them a reliable upgrade for serious Honda engine builders.

Installation & Fitment

The Skunk2 Ultra Valve Springs are designed as a direct bolt-on upgrade for Honda K20C1 and K20C4 engines from 2016 through 2023. Installation typically involves removing the cylinder head and replacing the existing springs with these high-performance units. No additional modifications or tuning are required for installation, but it is recommended to have a professional perform the upgrade to ensure proper setup and valve clearance.

Proper installation and break-in procedures will maximize the lifespan and performance of these springs. Always verify compatibility with your specific engine setup before installation.

What's Included

• Set of ultra valve springs (quantity as specified for your engine)
• Spring seats and retainers (if included in the kit)
• Installation hardware and instructions (if provided)

Ideal For

• Honda K-series engine enthusiasts seeking high-performance upgrades
• Builds involving high-lift camshafts and increased RPM limits
• Street and track applications demanding reliable valvetrain stability
• Engine builders aiming for consistent, long-term performance under high stress