GSC High Pressure Conical Valve Spring Kit w/ Titanium Retainers – Mitsubishi 4B11T (GSC5062)
Engineered for Maximum RPM and Boost Control
The GSC Power Division high-pressure conical valve spring kit (PN GSC5062) is designed for Mitsubishi 4B11T engines operating at extreme performance levels. This complete kit includes 16 conical valve springs, 16 titanium retainers, and 16 valve spring seats, delivering superior valvetrain stability under high RPM and boost conditions.
Spring Pressure & Lift Specs
- Intake Seat Pressure: 112 lbs @ 1.294"
- Exhaust Seat Pressure: 110 lbs @ 1.300"
- Intake Open Pressure: 259 lbs @ 0.849"
- Exhaust Open Pressure: 257 lbs @ 0.855"
- Maximum Valve Lift: 0.437"
- Coil Bind: 0.818"
Performance Limits
- Max RPM: 11,000
- Max Boost: 55 psi
- Cam Compatibility: Supports up to 11.30mm lift
Product Details
- Part Number: GSC5062
- Fitment: Mitsubishi 4B11T engines
- Includes: 16 conical valve springs, 16 titanium retainers, 16 valve spring seats
Why Conical Springs?
True conical springs offer distinct advantages over traditional cylindrical and beehive designs. Their tapered coil shape and variable spacing naturally dampen valvetrain harmonics, reducing shock transfer and minimizing wear. This translates to longer component life and improved stability at high RPM. GSC’s conical springs feature a super-finished surface and undergo a proprietary multi-step heat treatment process, resulting in a highly durable, race-ready spring that supports aggressive cam profiles and elevated boost levels.
Fitment:
- 2008 - 2015 Mitsubishi Lancer Evolution X 2.0L Turbo (4B11T)
- 2009 - 2014 Mitsubishi Lancer Ralliart 2.0L Turbo (4B11T)
- 2010 - 2020 Mitsubishi Outlander GT 3.0L V6 (Note: Not applicable unless swapped with 4B11T head)
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