Engine Piston 13101-25030 for Toyota A25A / A25A-FKS 2.5L Engine
The Standard (STD) piston kit for the Toyota A25A 2.5L (A25A-FKS/FXS) engine typically features an 87.5 mm bore and is specifically designed for the high-compression Dynamic Force engine series (covering model years 2018 through 2025 and beyond). Its key technical specifications include: a displacement of 2,487 cc and a high compression ratio (13.0:1 or 14.0:1).
Description
Piston Kit Specifications:
Engine Model: Toyota 2.5L Dynamic Force (A25A-FKS/FXS).
Piston Diameter / Bore: Standard Size (STD) — typically 87.5 mm.
OEM Piston Part Numbers: Typically 13101-25030, 13101-25040.
Piston Ring Thickness: Typically 1.2 mm / 1.5 mm / 2.0 mm (standard configuration compliant with modern low-friction designs).
Piston Skirt Coating: Molybdenum coating.
Material: ZL109 Cast Aluminum Alloy.
Kit Components: Includes pistons, piston pins (wrist pins), and piston pin circlips (piston rings are typically sold separately, or may be included in the kit depending on the manufacturer).
Compression Ratio: 13.0:1 (FKS) to 14.0:1 (FXS Hybrid version).
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