ORIGINAL Mitsubishi Valve Spring Compressor for Lancer, Evo 6/7/8, Eclipse, 4G63 engines Makes removing the valve assemblies a lot easier. The body is anodized black CNC machined 6061 T6 aluminum, for excellent finish and durability. Won't slip and damage the cylinder head. Can be used with the head on the block. For Lancer, Evo 6/7/8, Eclipse, 4G63 engines.