JE Pro Seal Piston Rings 1.2 / 1.2 / 2.5 Subaru EJ257 Block w/EJ20 Head 100mm

JE Pro Seal piston rings — 1.2mm / 1.2mm / 2.5mm thickness ring set for Subaru EJ257 block fitted with EJ20 head, 100mm bore (PN JG4904-3937). Premium nitride-treated top ring, ductile second ring and 3-piece oil ring. Engineered to seal under high cylinder pressures on hybrid EJ257/EJ20 builds. UK JE distributor

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