GSC Conical Valve Spring Kit for Porsche 991/992 GT3, GT3 Cup & GT3 RSR – GSC5092
The GSC5092 Conical Valve Spring Kit is engineered for Porsche 991 and 992 GT3 platforms, including GT3 Cup and GT3 RSR variants. Designed to handle extreme RPM and aggressive cam profiles, this kit includes:
- (24) lightweight conical valve springs with superfinished surfaces
- (24) titanium retainers for reduced valvetrain mass
- (24) chromoly spring seats for durability under high load
Technical Specifications
| Setup | Coil Bind | Install Height | Seat Pressure | Open Pressure @ 13mm Lift | Max Valve Lift |
|---|---|---|---|---|---|
| Conical | 24.18mm / 0.952" | 40mm / 1.574" | 113 lbs | 265 lbs @ 1.062" | 14.25mm / 0.562" |
Max RPM: 11,000 RPM
Why Conical Springs?
Conical valve springs are a proven solution for managing valvetrain harmonics. Compared to cylindrical or beehive designs, conical springs offer superior damping characteristics thanks to their variable coil diameter and spacing. This design naturally absorbs shock and vibration, reducing wear and extending component life — a critical advantage in engines operating at the edge of mechanical limits.
Each GSC conical spring undergoes a proprietary multi-step heat treatment and surface finishing process, resulting in a high-performance spring that supports elevated RPMs and aggressive camshaft profiles with confidence.
Whether you're building a track-dominant GT3 or refreshing a Cup motor, the GSC5092 kit delivers the strength, stability, and precision needed for elite-level performance.
Fitment:
- 2014 Porsche 991 GT3
- 2015 Porsche 991 GT3
- 2016 Porsche 991 GT3
- 2017 Porsche 991 GT3
- 2018 Porsche 991 GT3
- 2019 Porsche 991 GT3
- 2020 Porsche 991 GT3
- 2021 Porsche 992 GT3
- 2022 Porsche 992 GT3
- 2023 Porsche 992 GT3
- 2024 Porsche 992 GT3
- 2014 Porsche 991 GT3 Cup
- 2015 Porsche 991 GT3 Cup
- 2016 Porsche 991 GT3 Cup
- 2017 Porsche 991 GT3 Cup
- 2018 Porsche 991 GT3 Cup
- 2019 Porsche 991 GT3 Cup
- 2020 Porsche 991 GT3 Cup
- 2021 Porsche 992 GT3 Cup
- 2022 Porsche 992 GT3 Cup
- 2023 Porsche 992 GT3 Cup
- 2024 Porsche 992 GT3 Cup
- 2014 Porsche 991 GT3 RSR
- 2015 Porsche 991 GT3 RSR
- 2016 Porsche 991 GT3 RSR
- 2017 Porsche 991 GT3 RSR
- 2018 Porsche 991 GT3 RSR
- 2019 Porsche 991 GT3 RSR
- 2020 Porsche 991 GT3 RSR
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
