GSC Power-Division +1mm Super Alloy Exhaust Valve Set (8) – Mitsubishi EVO X 4B11T – GSC2027-8
Designed for high-horsepower EVO X 4B11T builds, the GSC2027-8 Super Alloy exhaust valve set features +1mm oversized heads (30mm) and delivers exceptional durability under extreme exhaust gas temperatures—up to 2000°F. Each valve measures 5.5mm in stem diameter and 105.85mm in overall length.
Engineered for strength and longevity, these valves include chrome-polished stems that reduce friction and improve lubricity—especially when paired with GSC’s manganese bronze valve guides. The under-head dish is optimized for weight savings, while swirl-polished and backcut heads enhance airflow without compromising reliability.
Specs:
- Head Diameter: 30.00mm
- Stem Diameter: 5.5mm
- Overall Length: 105.85mm
- Material: Super Alloy for extreme heat resistance
- Finish: Chrome-polished stem for smoother motion
- Design: Swirl-polished and backcut for improved flow and durability
Fitment:
- 2008–2015 Mitsubishi Lancer Evolution X GSR
- 2008–2015 Mitsubishi Lancer Evolution X MR
- 2008–2015 Mitsubishi Lancer Evolution X Final Edition
- 2008–2015 Mitsubishi Lancer Evolution X SE (Special Edition)
- 2008–2015 Mitsubishi Lancer Evolution X FQ Series (UK models)
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
