RalliSpec LogoRalliSpec Group N Car at LSPR
> home / catalog / engine assy / short block / cosworth short block by rallispec

RalliSpec Built Cosworth Short Block

Cosworth is no longer producing and selling complete assembled short blocks. To fill the demand that still exists, we are now offering an equivalent product which we produce in-house at RalliSpec. We assemble the short blocks using all Cosworth components using the same processes and similar degree of precision in terms of blueprinting and balancing work. Each short block is built from a new factory bare block and machined to proper specifications. We fit Cosworth pistons, connecting rods, and bearings. Options exist between factory Subaru hardened crankshaft or Cosworth billet crank. Every crankshaft is precision dynamically balanced. A detailed specification sheet is supplied.

Please note that this is entirely a RalliSpec product and in no way are we representing this product to have been assembled or produced by Cosworth.

Usually ships in 2 to 3 weeks.

Manufacturer: Cosworth

Applications:

  • Subaru WRX STI MY15-17
  • Subaru Impreza WRX/STI MY08-14
Part No. Description Price Ea. Add to Cart
RSB-SS25COS RalliSpec Cosworth EJ25 Short Block - Standard 79mm Crank 8.2:1 CR $4800.00
RSB-SS25COSHC RalliSpec Cosworth EJ25 Short Block - Standard 79mm Crank 9.2:1 CR $4800.00
RSB-RS25COS RalliSpec Cosworth EJ25 Short Block - Billet 79mm Crank 8.2:1 CR $6300.00
RSB-RS25COSHC RalliSpec Cosworth EJ25 Short Block - Billet 79mm Crank 9.2:1 CR $6300.00