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The Outfront Motorsports 575 EJ257 2.5L Short Block is a performance-built EJ257 short block featuring forged internals and a semi-closed-deck design. It is rated by Outfront Motorsports for 575 BHP and provides a stronger foundation for high-performance Subaru STI builds.
| Specification | Details |
|---|---|
| Part Number | OUT-SB-575 |
| Engine | EJ257 |
| Displacement | 2.5L |
| Block Design | Semi-Closed Deck |
| Power Rating | 575 BHP |
| Pistons | Outfront Spec CP Forged |
| Piston Dish | 22cc |
| Connecting Rods | Outfront Motorsports H-Beam |
| Bearings | King Performance |
| Crankshaft | New OEM Subaru Black Nitrite |
| Case Halves | New EJ257 |
The 575 EJ257 Short Block is designed to provide a stronger foundation than a factory EJ257 short block. Forged pistons and H-beam connecting rods are suited for increased cylinder pressures and higher-output turbocharged applications, while the semi-closed-deck case retains the factory EJ257 architecture.
The 575 BHP rating is the manufacturer's stated rating. Actual engine output and reliability depend on the complete combination, including the cylinder heads, head studs, head gaskets, turbocharger, fuel system, engine management, tuning, and operating conditions.
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