Skunk2 Racing High Lift Valve Spring & Titanium Retainer Set

Compatible with Toyota Supra MK5 / BMW B58 / S58 (313-14-1000) 2020–2025

Part #: 313-14-1000

Overview

The Skunk2 Racing High Lift Valve Spring & Titanium Retainer Set is a high-performance upgrade designed for enthusiasts seeking enhanced durability and reliability in their engine's valvetrain. Specifically engineered for the Toyota Supra MK5 and BMW models equipped with the B58 and S58 engines, this set ensures your engine can handle increased lift and aggressive cam profiles without sacrificing long-term performance.

While Ultra Stage1 cams are compatible with stock OEM valve springs, Skunk2 recommends upgrading to their High Lift Valve Springs along with the lightweight Titanium Retainers for optimal durability and performance. This combination is ideal for those pushing their engines beyond stock specifications, whether for spirited street driving, track days, or high-performance tuning. By choosing Skunk2's proven components, you’ll benefit from consistent valve control, reduced valve float, and improved overall engine response.

Key Features

Skunk2's High Lift Valve Spring & Titanium Retainer Set is built with precision and quality to meet the demands of high-performance applications. The key features include:

• Manufactured from super-clean, high tensile strength chrome-silicone wire, ensuring superior fatigue resistance and longevity under high-stress conditions.
• Shot peen stress relief process enhances the internal grain structure, reducing the risk of fatigue failure during extended use.
• Heat-treated for added strength and stability, maintaining consistent spring pressure even under high RPM operation.
• Designed to support increased valve lift and aggressive cam profiles, making it suitable for high-performance engine builds.
• Lightweight Titanium Retainers reduce overall valvetrain mass, contributing to higher RPM stability and quicker valve response.
• Engineered specifically for the B58 and S58 engines, ensuring perfect fitment and reliable operation in your vehicle.
• Helps support increased horsepower and torque by maintaining optimal valve control during high-lift camshaft operation.

Construction & Design

This valve spring and retainer set features a meticulously engineered design to maximize durability and performance. The springs are crafted from high-quality chrome-silicone wire, which provides excellent tensile strength and fatigue life. The shot peening process introduces beneficial compressive stresses on the surface, significantly improving resistance to cracking and failure over time. Heat treatment further enhances the material's properties, ensuring the springs can withstand the rigors of high-RPM operation and aggressive cam profiles.

The titanium retainers are lightweight yet incredibly strong, reducing the overall mass of the valvetrain components. This reduction in mass allows for quicker valve acceleration and deceleration, which is crucial for high-revving engines. The precise manufacturing tolerances and high-quality materials ensure a perfect fit and reliable long-term operation, making this set a top choice for performance enthusiasts and professional tuners alike.

Installation & Fitment

This set is designed as a bolt-on upgrade for the specified engines, requiring no modifications to the cylinder head or valvetrain components. Proper installation involves removing the existing springs and retainers and replacing them with the Skunk2 components, following standard valvetrain service procedures. It is recommended to have a qualified technician perform the installation to ensure correct spring pressure and proper valve clearance. No special tuning or additional modifications are necessary, but verifying valve clearances and spring pressures after installation is advised for optimal performance and longevity.

• Compatible with OEM or aftermarket high-performance camshafts.
• No cutting, drilling, or special tuning required beyond standard valvetrain setup procedures.

What's Included

• High lift valve springs (set of 16)
• Titanium retainers (set of 16)
• Installation instructions

Ideal For

• Performance enthusiasts upgrading their B58 or S58 engine
• High-revving engine builds requiring durable valvetrain components
• Track day and racing applications where valve control at high RPM is critical
• Long-term durability in high-stress engine environments