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Cosworth Subaru EJ25 (2.5L) 2004-06 w/ Big Valve Cylinder heads and KK3920 Camshafts-Billet Crank 8.2:1cr

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Cosworth Subaru EJ25 (2.5L) 2004-06 w/ Big Valve Cylinder heads and KK3920 Camshafts-Billet Crank 8.2:1cr
[20000160]

£12,527.26 inc. VAT
£10,439.38 exc. VAT

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Please contact for availability . 0121 661 6263

Cosworth   Free delivery within UK and EU

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Product Details

The Cosworth Subaru EJ25 CS600 series is designed for extreme track day use and the demanding performance enthusiast. Each assembly is precision built by one of Cosworth’s skilled craftsmen using the finest components to ensure maximum and reliable power and performance. Each bore is meticulously diamond honed to guarantee perfect piston to cylinder wall clearance. Next the block is assembled with Cosworth forged pistons, motorsport grade forged H-Beam connecting rods along with high performance rod and main bearings and a new STI forged crankshaft. Once the cylinder block assembly is completed, a pair of CNC machine port bored big valve cylinder heads with proven “S2” camshafts complete with valve lash set to our specifications. The cylinder heads are secured with high performance 11mm steel studs and sealed with a Cosworth high performance stopper layer steel head gasket. Finally, a blue printed, high pressure oil pump is installed for maximum lubrication.
This proven engine combination has been used by top teams to win race and rally events in North America, Asia and Europe.

Features:

  • New Subaru EJ25 STI engine case
  • New Subaru EJ25 STI forged crankshaft
  • Optional Cosworth billet crankshaft (79/81mm stroke availale
  • Cosworth forged h-beam connecting rods
  • Cosworth forged pistons and rings
  • Cosworth motorsport tri-metal bearings
  • Balanced to within 0.5 gram
  • Complete blue printed assembly
  • Enlarged intake and exhaust ports
  • Large diameter stainless steel intake valves
  • Large diameter inconel exhaust valves
  • Hi-rev, dual valve springs
  • Titanium retainers
  • Hardened steel spring platforms
  • Multi angle valve job
  • CNC machine port finish
  • Knife edge port divider
  • Cosworth S2 high lift camshafts
  • Valve lash set
  • Cosworth high pressure oil pump
  • Cam covers
  • Cosworth serial number

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Need more information? Send us a message and we will do our best to help you.


About Cosworth High Performance Long Block Assemblies

The Cosworth Subaru EJ25 CS600 series is designed for extreme track day use and the demanding performance enthusiast.

Each assembly is precision built by one of Cosworth’s skilled craftsmen using the finest components from our parts catalogue to ensure maximum reliable power and performance. Starting with a new Subaru EJ257 semi closed deck block, we meticulously diamond hone each bore to guarantee perfect piston to cylinder wall clearance.

The block is then assembled with our Forged Pistons, motorsport grade Forged H-Beam connecting rods along with our high performance rod and main bearings and a new STI forged crankshaft.

For maximum performance, an optional steel billet crank is available (CS600X). Once the cylinder block assembly is completed, we install a pair of our CNC machine port-bored Big Valve Cylinder heads with our proven “S2” camshafts complete with valve lash set to our specifications.

The cylinder heads are secured with our high performance 11mm steel studs and sealed with a Cosworth high performance stopper layer steel head gasket.

Finally, we install one of our blue-printed, high pressure oil pumps for maximum lubrication. This proven engine combination has been used by top teams to win events in both North America and Europe.

Features:

  • New Subaru EJ25 STI Engine case
  • New Subaru EJ25 STI Forged Crankshaft
  • Optional Cosworth Billet Crankshaft (79/81mm stroke available)
  • Cosworth forged H-beam Connecting rods
  • Cosworth Forged Pistons and rings
  • Cosworth motorsport Tri-metal bearings
  • Balanced to within 0.5 gram
  • Complete blue-printed assembly
  • Enlarged intake and exhaust ports
  • Large diameter stainless steel intake valves
  • Large diameter inconel exhaust valves
  • Hi-rev, dual valve springs
  • Titanium retainers
  • Hardened steel spring platforms
  • Multi angle valve job
  • CNC machined port finish
  • Knife edge port divider
  • Cosworth S2 High lift camshafts
  • Valve lash set
  • Cosworth high pressure oil pump
  • Cam covers
  • Cosworth serial number

About Cosworth

Cosworth has been at the forefront of motorsport activity for over 50 years and is a brand synonymous with success. Cosworth continues to develop and supply exciting powertrain and electronics products for use at all levels of the sport, from class leading 'off the shelf' products at clubman level, through to bespoke 'state of the art' developments for the pinnacle of the sport.

Read More

Cosworth High Performance Parts are designed to deliver optimal performance for a range of the most popular production cars.

For more information regarding this brand and for full price lists and vehicle applications please click the following link - Cosworth

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Suitable For

Manufacturer Model Variant Chassis Engine Year Range Notes
Subaru - - - - - -
Subaru Impreza - - EJ25 - -
  • This product was added to our catalog on Thursday 01 September, 2011.
  • Last updated Friday 21 March, 2014.

Please note: Due to fluctuating exchange rates prices may vary from those shown.
All prices will be confirmed before payment is taken. Special offers are subject to availability.

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