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For a limited time, we are now offering FREE SHIPPING on Cosworth Engine's!
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. We then balance the rotating assembly that includes a new STI 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 our own coated, tri metal race spec bearings.
EJ257 Short Block with Forged Pistons and Rods - (8:2:1 Compression)
EJ257 Short Block with Forged Pistons and Rods, 79mm Billet Crankshaft- (8:2:1 Compression)
EJ257 Short Block with Forged Pistons and Rods, 81mm Billet Crankshaft- (8:2:1 Compression)
High Compression EJ257 Short Block with Forged Pistons and Rods, OEM Cranksaft (9:2:1 Compression)
High Compression EJ257 Short Block with Forged Pistons and Rods, 79mm Billet Cranksaft (9:2:1 Compression)
High Compression EJ257 Short Block with Forged Pistons and Rods, 81mm Billet Cranksaft (9:2:1 Compression)
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