GSC Power Division 1010 Viton Valve Stem Seals Set of 16 for 2008-2015 Evo X

Vehicle Fitment

• 2008-2015 Mitsubishi Lancer Evolution X, 4B11T 2.0L Turbocharged DOHC

Fitment Notes

• Fits all 4B11T-equipped Evolution X models regardless of trim level (GSR, MR, SE)
• Covers all 16 valve stems on the 4B11T cylinder head - 8 intake and 8 exhaust
• Verify valve stem diameter compatibility if non-stock valves are installed; these seals are sized for OEM-diameter valve stems

Features

• Genuine DuPont Viton® fluoroelastomer material - developed specifically for the elevated temperatures, fuels, and chemical exposure seen in high-performance turbocharged engines
• Superior heat resistance compared to standard OEM rubber seals - better suited to the elevated operating temperatures of modified and high-horsepower 4B11T applications
• Improved resistance to fuel and oil contamination, reducing seal degradation and extending service life in high-mileage or high-performance applications
• Applied to both intake and exhaust valve seals - no cutting corners with lower-spec seals on either bank
• Reduces oil consumption and carbon buildup caused by worn or degraded OEM seals in high-temperature or high-rpm operation
• Set of 16 covers a complete 4B11T head rebuild - all intake and exhaust valves in one kit
• Significantly more affordable than OEM dealership pricing while meeting or exceeding OEM sealing performance

Specifications

• Part Number: 1010
• Material: DuPont Viton® Fluoroelastomer
• Quantity: 16 (full set - 8 intake + 8 exhaust)
• Application: Mitsubishi 4B11T 2.0L DOHC Turbocharged
• Coverage: All intake and exhaust valve stems

Included Components

• 16x GSC Power Division Viton Valve Stem Seals (intake and exhaust)

Product Description

The GSC Power Division 1010 is a full set of 16 Viton valve stem seals for the Mitsubishi 4B11T engine found in the 2008-2015 Lancer Evolution X. Made from genuine DuPont Viton fluoroelastomer, these seals offer substantially better resistance to heat, fuel, and chemical exposure than the standard OEM rubber seals - making them the right choice when rebuilding a high-performance or high-mileage 4B11T head. Both intake and exhaust valve seals are included in the kit, and both are the same Viton compound, ensuring consistent sealing performance across all 16 valves.

Worn or degraded valve stem seals are a common cause of oil consumption, blue exhaust smoke at startup, and carbon buildup on intake valves in high-mileage or hard-driven 4B11T engines. Replacing them with the GSC Viton seals during a head build or gasket job is an inexpensive step that pays dividends in long-term reliability and cleanliness. These seals are sized for OEM-diameter valve stems; confirm compatibility if running non-standard valves.