GSC Conical Valve Spring Kit w/ Titanium Retainers – Toyota G16E-GTS – GSC5017
High-RPM Valve Spring Kit for GR Yaris & GR Corolla
The GSC Power-Division Conical Valve Spring Kit is engineered for the Toyota G16E-GTS engine found in the GR Yaris and GR Corolla. This complete kit includes 12 conical valve springs, 12 titanium retainers (6 intake / 6 exhaust), and 12 spring seats—designed to handle extreme RPM and boost demands.
Performance Specs
- Seat Pressure: 107 lbs @ 1.310" install height
- Open Pressure: 263 lbs @ 0.838" (12mm valve lift)
- Coil Bind: 0.787"
- Max Valve Lift: 0.472"
- Max RPM: 10,000 RPM
- Max Boost: 60 psi
Why Conical Springs?
Conical valve springs are proven to outperform traditional cylindrical and beehive designs by naturally dampening valvetrain harmonics. Their tapered coil geometry helps absorb shock and reduce stress across the valvetrain, extending component life and improving stability at high RPM.
Built for Extreme Conditions
Each spring undergoes a multi-stage heat treatment and super-finishing process to maximize durability and performance. Whether you're chasing higher RPMs or running aggressive cam profiles, this kit is built to keep up with the demands of modern turbocharged engines.
Fitment:
- 2021–2025 Toyota GR Corolla 1.6L Turbo Inline-3 (G16E-GTS)
- 2020–2025 Toyota GR Yaris 1.6L Turbo Inline-3 (G16E-GTS, international markets)
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
