GSC Power-Division 5017 Conical Valve Spring Kit /Ti Retainers for 23-25 Toyota

Vehicle Fitment

• 2023-2025 Toyota GR Corolla (G16E-GTS)
• 2020-2025 Toyota GR Yaris (G16E-GTS)

Features

• High-pressure conical valve spring design for superior harmonic control
• Titanium retainers reduce valvetrain mass for better response
• Enhanced valvetrain stability at high RPM
• True conical design dampens valvetrain harmonics vs cylindrical springs
• Heat-treated and super-finished valve spring surfaces for durability
• Supports aggressive cam profiles and performance tuning
• Capable of handling high boost and high engine speeds
• Direct OEM-style fitment for G16E-GTS engines

Specifications

• Part Number: 5017
• Spring Type: Conical high-pressure valve springs
• Install Height: ~1.310"
• Seat Pressure: ~107 lbs
• Open Pressure: ~263 lbs @ ~0.838" lift
• Coil Bind: ~0.787"
• Max Valve Lift: ~0.472" (~12 mm)
• Max RPM Capability: ~10,000 RPM
• Max Boost Support: ~60 psi

Included Components

• 12x Conical valve springs
• 12x Titanium retainers
• 12x Chromoly spring seats

Product Description

The GSC Power-Division 5017 Conical Valve Spring Kit with titanium retainers and chromoly seats is engineered for Toyota's high-revving G16E-GTS engines found in the GR Corolla and GR Yaris. Utilizing a true conical spring design, this kit offers superior valvetrain harmonic control and stability compared with traditional cylindrical or beehive springs, especially at elevated engine speeds and under performance tuning conditions.

With robust seat and open pressures and an install height tailored to the G16E-GTS platform, the 5017 kit supports aggressive cam profiles and higher boost pressures up to approximately 60 psi, making it suited for both tuned street cars and competition builds. Lightweight titanium retainers and chromoly seats reduce rotating mass while increasing durability and reliability under demanding use. Direct OEM-style fitment ensures straightforward installation during engine builds or upgrades.