GSC Power Division 5091 Beehive Valve Spring & Ti Retainer Kit for 20-23 Toyota

Vehicle Fitment

• 2020-2023 Toyota Supra 3.0 (B58B30C)
• 2018-2023 BMW Z4 M40i (B58B30O1)

Fitment Notes

• Compatible with Gen 2 B58 engines featuring Double VANOS and Valvetronic systems
• Designed for high-performance applications requiring valve spring upgrades
• Not intended for stock or mild builds

Features

• Beehive spring design for reduced weight and improved high-RPM stability
• Titanium retainers for enhanced durability and reduced valvetrain mass
• Advanced heat treatment for superior load retention and fatigue resistance
• Supports maximum valve lift up to 11.0mm (0.472 inches)
• Max RPM capability of 9,300 RPM
• Maximum boost pressure rating of 70 psi
• Precision-engineered for optimal fitment and performance
• Includes 24 beehive valve springs and 24 titanium retainers (12 intake, 12 exhaust)

Specifications

• Spring Type: Beehive
• Coil Bind Height: 0.900 inches
• Installed Height: 1.417 inches
• Seat Pressure: 100 lbs
• Open Pressure at 0.984 inches: 227 lbs
• Maximum Valve Lift: 0.472 inches (12mm)
• Max RPM: 9,300 RPM
• Max Boost: 70 psi
• Includes: 24x Beehive Valve Springs, 24x Titanium Retainers

Product Description

The GSC Power Division 5091 Beehive Valve Spring and Titanium Retainer Kit is engineered for high-performance applications of the Toyota Supra and BMW Z4 equipped with the B58 engine. This kit is designed to handle the increased demands of high-RPM operation and elevated boost levels, making it ideal for builds aiming for substantial power gains.

Featuring a beehive spring design, the kit offers reduced weight and improved high-RPM stability, while the titanium retainers provide enhanced durability and further reduction in valvetrain mass. The advanced heat treatment ensures superior load retention and fatigue resistance, allowing the engine to perform reliably under extreme conditions.

With a maximum valve lift capability of 11.0mm and a maximum RPM rating of 9,300, this kit supports aggressive camshaft profiles and high-boost setups. The included components are precision-engineered for optimal fitment and performance, ensuring a seamless integration into your engine build.

Please note that professional installation is recommended to ensure proper setup and to achieve the best performance outcomes. This kit is not intended for stock or mild builds and is best suited for enthusiasts seeking to maximize the potential of their B58-powered vehicles.