GSC P-D 4G63T Evo 1-9 / 90-98 DSM Viton 6.6mm Valve Stem Seal Set

SKU: 1002

GSC P-D 4G63T Evo 1-9 / 90-98 DSM Viton 6.6mm Valve Stem Seal Set

Upgrade your 4G63T engine with GSC Power-Division Viton valve stem seals designed for Evo 1-9 and 90-98 DSM vehicles including Eclipse GST GSX Talon TSi and Galant VR-4. These 6.6mm seals deliver precise oil control to prevent leaks during aggressive driving and track use. Built for performance enthusiasts they maintain seal integrity under high heat and pressure.

Key Features

• Viton Material: Resists temperatures up to 450°F and harsh oils for long-lasting performance in turbocharged 4G63T engines
• 6.6mm Stem Diameter: Exact match for factory and aftermarket valves ensuring zero play and positive sealing on intake exhaust
• Complete Set: Includes 16 seals (8 intake 8 exhaust) covering full cylinder head requirements
• Positive Seal Design: Aero-dynamic shape reduces oil blow-by at high RPMs keeping valvetrain clean and power consistent
• Black Viton Construction: Enhanced durability over stock rubber seals for rebuilt heads and high-boost applications

Product Notes

• Replace seals during every valve seal service or cylinder head rebuild for best results
• Inspect valve guides for wear before installation to ensure optimal sealing
• Ships in anti-static protective packaging to prevent damage

Installation Notes

• Professional installation recommended.
• Use GSC seal driver tool or equivalent to press seals evenly without damage
• Compatible with stock heads ported heads and aftermarket valvetrain components

This Part Fits

Year	Make	Model	Submodel
1990-1998	Eagle	Talon	TSi
1990-1994	Mitsubishi	Eclipse	GS
1990-1999	Mitsubishi	Eclipse	GST
1990-1999	Mitsubishi	Eclipse	GSX
1996-1999	Mitsubishi	Eclipse	Spyder GST
1991-1992	Mitsubishi	Galant	VR-4
2005-2006	Mitsubishi	Lancer	Evolution
2005-2006	Mitsubishi	Lancer	Evolution MR
2005-2006	Mitsubishi	Lancer	Evolution RS
2006	Mitsubishi	Lancer	Evolution SE
1990-1994	Plymouth	Laser	RS

Why Choose GSC Power-Division?

• Made in USA with motorsport-proven designs trusted in drag racing and time attack
• Focus on 4G63T valvetrain components for DSM and Evo builders worldwide
• CNC-machined tolerances for drop-in fit and zero leaks under boost

Frequently Asked Questions

• Q: Does this fit Evo 9 MR with stock head?
  A: Yes fits all 4G63T heads in Evo 1-9 including 2005-2006 Lancer Evolution MR RS SE with 6.6mm valve stems
• Q: What material are these seals made from?
  A: High-grade black Viton fluoroelastomer resists oil degradation heat and swelling unlike stock seals
• Q: What warranty applies?
  A: GSC offers limited lifetime warranty against defects when installed properly covers manufacturing flaws

Shipping & Handling

• Method: Standard ground shipping
• Availability: In stock – ships same or next business day
• Packaging: Compact box 6 x 4 x 2 inches
• Weight: 0.25 lbs