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Genuine HKS piston kit. Manufacturer part number - 21003-AT004.
FITMENT AND SPECIFICATIONS
| Product | Engine | Capacity (ml) | Type | Boring・Honing modification | Full flow modification | Code No. | Remarks |
|---|---|---|---|---|---|---|---|
| FORGED PISTON KIT (LOW COMP) φ86.0 | FA20 | 2091 | φ86.0 - φ22 | Not required | Not required | 21003-AT004 | Make to order item FORGED PISTON + PISTON PIN + PISTON RING |
| Product | Engine | Capacity (ml) | Type | Boring・Honing Modification | Full flow modification | Code No. | Remarks |
|---|---|---|---|---|---|---|---|
| FORGED PISTON KIT (LOW COMP) φ86.0 | FA20 | 2091 | φ86.0 - φ22 | Not required | Not required | 21003-AT004 | Make to order item FORGED PISTON + PISTON PIN + PISTON RING |
Match the engine, chassis, transmission and all application restrictions before ordering.
PURCHASED PARTS PACKAGE
One HKS piston kit under part number 21003-AT004. See the application table for the supplied specification and separately required parts. This is a piston kit, not a complete stroker kit.
INSTALLATION AND OPTIONS
Professional installation and the manufacturer application instructions are required. The image is a manufacturer product-family illustration. The supplied components and dimensions follow the part number and table above.

HKS Low-Compression Piston Kit for FA20 2.1L Kit - 21003-AT004

