TOYOTA Piston 4AF AE92 13101-16090 Product Description: OEM No/Model: 4AF, AE92, 13101-16090 Piston Material : ZL109 Aluminium Alloy , Alloy cast iron. Piston Feature : Satin Anodised Aluminium ,phosphating ,Alfin ,Double Alfin , No Alfin , Graphite , Oil cooling channel , Sn(tin) plated , Steel Piece , Top Oxidization , Skirt Graphite Printed , Three or Four Ring Grooves