Supertech GR Supra B58 Beehive Valve Spring Kit
SPECIAL ORDER ITEM
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Once an order is placed it cannot be cancelled or returned.
This product has a longer lead time than most. Lead times may vary on products with multiple options.
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Overview
Upgrade your Toyota GR Supra A90/A91’s B58 3.0L turbo‑charged inline‑6 with Supertech Beehive Valve Springs — available in two performance levels. Both kits are precision-engineered to improve valvetrain stability, reduce valve float, and support higher RPM operation, making them perfect for performance, track, or tuned builds.
The stock B58 valve springs are excellent for factory performance, but spirited driving, high RPM operation, or tuning can push them beyond their limits. Supertech Beehive Valve Springs improve harmonic control, reduce valve float, and help maintain precise valve timing for enhanced throttle response, power delivery, and engine reliability.
Kit Options
1. Supertech SPRK‑MCB58
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Seat Pressure: ~75 lbs @ 37 mm
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Open Pressure: ~155 lbs @ 10 mm
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Spring Rate: ~8 lbs/mm
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Ideal for mild to moderate performance upgrades
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Provides improved valvetrain control over stock while remaining suitable for daily driving and lightly tuned engines
2. Supertech SPRK‑MCB58‑2
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Seat Pressure: ~84 lbs @ 37 mm
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Open Pressure: ~157 lbs @ 10 mm
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Spring Rate: ~7.25 lbs/mm
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Recommended for aggressive builds, high RPM operation, and track use
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Stronger spring pressures provide tighter valve control, making it ideal for higher boost, performance cams, or heavily tuned GR Supras
Shared Features
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Valve Spring Type: Beehive (conical) for reduced mass and improved stability
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Max Lift: ~12.2 mm
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Coil Bind Height: ~23.3 mm
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Material: High-strength chrome silicon vanadium steel for durability
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Compatible with performance retainers and keepers
Compatibility
- 2020+ GR Supra w/B58 3.0L