Cosworth Short Block 1 Subaru WRX / STI 2002-2014

Add to Wishlist


Cosworth EJ25 (STI) short block has gone through countless hours of dyno evaluation to determine the best combination of parts to guarantee maximum reliable performance. Each EJ25 short block starts with a brand new Subaru case. The case is inspected and then the bores are honed to perfection to receive Cosworth Forged Pistons. They then balance the rotating assembly that includes a new Subaru Forged crank and Cosworth Forged H-Beam Connecting Rods to within .5 gram. The select parts are professionally assembled by one of Cosworth's skilled engine builders using their own coated, tri metal race spec bearings.

  • New Subaru EJ25 STI Engine case
  • Subaru Forged 79mm Crankshaft
  • Cosworth Forged H-beam Connecting Rods
  • Cosworth Forged Pistons and rings
  • Cosworth Coated, Tri-metal bearings
  • Balanced to within .5 gram
  • Complete blue-print assembly
  • Ring gap checked
  • Bearing clearance checked
  • Deck height checked
  • Connecting Rod side clearance checked
  • Crankshaft end float checked
Ground Shipping only.


Nobody has reviewed this product yet! Want to be the first one?

Review This Product

You're reviewing: Cosworth Short Block 1 Subaru WRX / STI 2002-2014