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

These are GSC Power Division Viton valve stem seals, specifically made for the 4G63T engine found in many DSM (Diamond-Star Motors) vehicles like the Mitsubishi Eclipse, Eagle Talon, and Plymouth Laser from the early to late 90s, as well as later Evo 1-9 models. If you're rebuilding the top end of your engine, replacing these seals is a crucial step to ensure proper valve operation and prevent oil from leaking into the combustion chamber.

Viton is a high-performance material known for its excellent resistance to heat and oil, which is exactly what you need in this high-stress area of the engine. The 6.6mm stem size is specific to these applications, ensuring a snug fit on your valve stems. Installing new seals helps maintain good compression, reduces oil consumption, and can even help improve emissions by preventing excess oil burn-off.

When you're working on the cylinder head, it's always a good idea to replace these seals. They are relatively inexpensive and a critical part of a healthy engine rebuild. Make sure you have the right tools to install them properly without damaging the seal or the valve guide.