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The Cosworth Subaru EJ25 CS600 series is designed extreme track use the demanding performance enthusiast. Each assembly is precision built by of Cosworths skilled craftsmen using finest components from parts catalog to ensure maximum reliable power performance. Starting with a Subaru EJ257 semi closed deck block; we meticulously hone each bore to guarantee perfect piston to cylinder wall clearance. block is then assembled with Forged Pistons; motorsport grade Forged H Beam connecting rods along with high performance and main bearings a STI Forged crankshaft. maximum performance; an optional steel billet crank is available (CS600X). Once cylinder block assembly is completed; we install a pair of CNC machine port-bored Valve Cylinder heads with proven S2 camshafts complete with valve lash to specifications. cylinder heads secured with high performance 11mm steel studs sealed with a Cosworth high performance stopper layer steel head gasket. Finally; we install of blue-printed; high pressure pumps maximum lubrication. This proven engine combination been used by teams to events in both North Americaand Europe.
Key Features
New Subaru EJ25 engine
New Subaru EJ25 Forged Crankshaft
Optional Billet Cosworth Crankshaft (CS600X)
Cosworth Forged H-beam Connecting Rods
Cosworth Forged Pistons rings
Cosworth motorsport Tri-metal bearings
Balanced to within gram
Complete blue-print assembly
Enlarged Intake 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 pump
Cam covers
Cosworth serial number Learn More

GReddy Carbon Hood Damper Kits are carefully designed for each specific OEM hood application. The high-end Carbon Damper and the locking ball joint / cup mounts allow for smooth opening and closing operation. Installation is also made very easy with English instructions and labeled mounts for both the Hood and Fender. GReddy Carbon Hood Dampers are a great way to update and improve the functionality and looks of your modified engine bay. Learn More

Flat Rate Shipping: $155 - Please select at checkout.
SEIBON Carbon Fiber Side Skirts are designed to replace your factory side skirts (if equipped) or be added to your stock fenders and body for a subtle and stylish look. In addition. many side skirts add additional air ducting and the appearance that your vehicle is lower then it actually is. for that visual kick.
All SEIBON Carbon Fiber Products are:

Hand Laid
Wet Carbon Fiber
Clear Gel Coated from the Factory
Inspected Before Shipping Carbon Side Skirts
OEM Style
Engine :-
Aspiration :- T
Vehicle Engine Options :- EJ257
Vehicle Interior Options :- H4 Aspiration: T
Vehicle Exterior Options :- Fuel: FI-GAS
Cylinder Type :-
Vehicle Options :-
Carbon Side Skirts
OEM Style
Engine :-
Aspiration :- T
Vehicle Engine Options :- EJ257
Vehicle Interior Options :- H4 Aspiration: T
Vehicle Exterior Options :- Fuel: FI-GAS
Cylinder Type :-
Vehicle Options :- Learn More