By applying OX-FSP + OX-COAT processing to the forged sleeve.

Reduces aluminum welding and significantly increases cylinder/piston tip life.

Effective results with major car manufacturers
Water temperature: 30°C increase (620°C - 630°C → 660°C)
・Number of hardened parts: ▲28%～▲39%
- Foreign matter in product: Untreated 3.4% ⇒ 0.8%
・Sleeve deformation: ▲0.2mm (longitudinal deflection)
*In addition, expansion into the mold reduces defects such as seizing, delamination, and hot water circulation.