Choosing the right gasket is also crucial. Many manufacturers offer high-quality, durable gaskets made from materials like silicone or rubber, designed to withstand the heat and pressure of the LS3 engine Many manufacturers offer high-quality, durable gaskets made from materials like silicone or rubber, designed to withstand the heat and pressure of the LS3 engine Many manufacturers offer high-quality, durable gaskets made from materials like silicone or rubber, designed to withstand the heat and pressure of the LS3 engine Many manufacturers offer high-quality, durable gaskets made from materials like silicone or rubber, designed to withstand the heat and pressure of the LS3 enginels3 valve cover gasket. These materials ensure a tight seal, resisting deformation and deterioration over time.