- 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
Long Block Assemblies
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