Brian Crower GR Supra B58 Beehive Spring & Titanium Retainer Kit

Overview

Upgrade your B58 valvetrain for higher RPM performance and improved valve control with this premium beehive spring and titanium retainer kit from Brian Crower. Designed specifically for Toyota/BMW B58 inline-6 engines, this kit delivers lightweight, high-quality components ideal for modified engines, aggressive camshafts, or builds targeting higher rev limits.

As engine speed and camshaft aggressiveness increase, factory valve springs can struggle to maintain proper control. Upgrading to a purpose-built spring and retainer package reduces the risk of valve float, improves valvetrain stability, and supports reliable operation at higher RPM. The reduced mass of titanium retainers further enhances valve control by minimizing inertia.

Key Features

• Performance Beehive Valve Springs
  

  • Manufactured by PAC Racing from high-grade, super-clean chrome silicone alloy, these springs are engineered for consistent pressure and high-RPM stability, helping prevent valve float and improving valve control over factory springs.

• Titanium Valve Retainers
  

  • CNC machined from 6AL4V titanium round bar to precise tolerances, these retainers significantly reduce valvetrain mass while maintaining excellent strength, supporting faster valve action and improved reliability at elevated engine speeds.

• Optimized Spring Specifications
  

  • Spring free length: 1.607 in
    

  • Seat pressure: ~80 lb @ 1.450 in
    

  • Open pressure: ~180 lb @ 0.950 in
    

  • Coil bind height: 0.910 in
    

  • Maximum net cam lift: 0.480 in / 12.19 mm
    

  • Retainer reference: BC2325 / BC2326

• These specifications are well suited for higher lift camshafts while maintaining proper spring dynamics and durability.

• Complete Cylinder Head Kit
  

  • Includes a full set of 24 beehive valve springs and matching titanium retainers, providing complete coverage for the entire B58 cylinder head.

Compatibility

• 2020+ GR Supra w/B58 3.0L