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08-10 Subaru EJ257 STI 2.5 Liter Short Block

This is a genuine Subaru EJ257 2.5 liter fully loaded and pre-balanced short block. This is a great option for STI owners that may want to build a spare motor or who need to replace a damaged motor. The full rotating assembly comes balanced, sealed and loaded with an OEM crank, rods and pistons-- just bolt it up, break it in and you are good to go.

  • Notes:
  • THIS IS NOT A COMPLETE MOTOR: This is a fully assembled bottom end, which consists of a block, crank, rods and pistons only. You will need to reuse your stock cylinder heads or purchase replacements.
  • For high-powered applications, we recommend replacing the cast OEM pistons in this block with CP Forged OEM-size units
  • For shipping outside of the continental US, give us a call.
  • Subaru STI 2008-2010
Description Part # MSRP Price Inventory  
OEM EJ257 Shortblock 10103AC050 $2,764.61 $2,303.84 Usually ships in 7-10 days
Mon-Fri 8am-6pm
© 2017 JSC Speed Inc.  All Rights Reserved.
1635 Bustleton Pike, Suite B, Feasterville, PA 19053
Tel: 215.489.2820
Mon-Fri 8am-6pm

©2017 JSC Speed Inc.
All Rights Reserved.

1635 Bustleton Pike,
Suite B
Feasterville, PA

Tel: 215.489.2820