ASF Machine • Engine Block

Subaru EJ257 ASF Stock Plus Shortblock

The "stock plus" shortblock had been proven to handle upwards of 420 wheel horsepower on high octane fuel whilst keeping a quiet cold start and minimal oil consumption. The key lies in our individualized painstaking blueprint process. We have determined that EJ series ring land failures can be attributed to a combination of factor that cause abnormal combustion (read hotter than what is acceptable for the materials).