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Subaru Impreza STI/WRX STI EJ25 High Performance Pistons-Kit WISECO
- High Boost
- Extremely light
- Piston skirt coated

- Description
- Original Wiseco
- Extremely light thanks to special alloy
- Reinforced for maximum performance
- 23mm piston pin
- Piston shirt coated for less friction
- Complete set including piston pins, rings and clips
- Installation and drilling dimensions are included
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Forged high performance pistons from Wiseco for your Subaru Impreza STI / WRX STI with engine code EJ25
Features:
The specified compression is in connection with a 1.37mm series cylinder head gasket. We also recommend either using the standard connecting rods with ARP connecting rod bolts or converting directly to H-rod connecting rods.
Made in the USA
Illustration similar.
Engine | Engine code |
---|---|
2.5 Boxer | EJ257 | 309 hp (227 kW) |


Accessories
Forged high performance pistons from Wiseco for your Subaru Impreza STI / WRX STI with engine code EJ25
Features:
- Original Wiseco
- Extremely light thanks to special alloy
- Reinforced for maximum performance
- 23mm piston pin
- Piston shirt coated for less friction
- Complete set including piston pins, rings and clips
- Installation and drilling dimensions are included
The specified compression is in connection with a 1.37mm series cylinder head gasket. We also recommend either using the standard connecting rods with ARP connecting rod bolts or converting directly to H-rod connecting rods.
Made in the USA
Illustration similar.
Engine | Engine code |
---|---|
2.5 Boxer | EJ257 | 309 hp (227 kW) |


Accessories