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Subaru EJ25 Cobb Tuning Built Complete Engine With Heads

  • 2100.00 £
  • Published date: August 8, 2025
    • Thaxted, Essex, United Kingdom

Subaru EJ25 Cobb Tuning Built Complete Engine With Heads


⭕ This is a Cobb Tuning Pro Series built complete long block Subaru EJ25 engine. This engine has about 2000 miles on it, 1200 of them was break in miles. This engine was assembled by Fine Line Imports and is ready for all the engine sensors, intake manifold, engine wire harness, exhaust system, fuel system (to support 500 whp +), turbo system (GT35 minimal) and intercooler for install.

Parts include:

1. Cobb Tuning Pro Series Stage 1 block

- EJ25 STI Semi-closed Block (2.5L Displacement)
- Darton Ductile Iron Sleeves
- Crower (custom built to Cobb Tunings spec) Billet Steel (4340) I-beam Long Connecting Rods
- JE (custom built to Cobb Tunings spec) Forged Aluminum 3D Chamber Matched Pistons (8.2:1 CR, customizable)
- Heavy-Duty Chromoly Piston Pins
- Low Friction Piston Rings
- STI Forged Chromoly Crankshaft (79mm Stroke)
- Calico Professional Series Rod and Main bearings
- Computerized Balance of rotating assembly

2. Cobb Tuning Stage 2 CNC Ported heads

- New Subaru Castings
- CNC Porting
- Intake Flow increased +20%
- Exhaust Flow increased +42%
- Hand Blended
- Deburred
- Multi-Angle Valve Job
- Vacuum Tested Valve Seats
- Ferrera SS In. Valves(+1mm Oversized)
- Ferrera Inconel Ex. Valves ( +1mm Oversized)
- Ferrera Performance Dual Valve Springs
- Ferrera Titanium Retainers
- Hardened Spring Seats
- Matched Combustion Chambers

3. STI OEM oil pan (installed)

4. STI OEM oil cooler (installed)

5. STI OEM oil dip stick tube with dip stick (installed)

6. STI OEM coolant cross over tube (installed)

7. STI OEM water pump (new at build, installed)

8. Cobb Tuning 12mm oil pump (new at build, installed)

9. STI OEM timing belt (new at build, installed)

10. STI OEM timing belt tensioners, idlers (new at build, installed)

11. STI OEM timing belt covers (installed)

12. STI OEM cam gears (installed)

13. Cobb Tuning crankshaft pulley (new at build, installed)

14. Cosworth .78mm headgaskets (installed)

15. ARP head studs (installed)

16. STI OEM spark plugs (new at build, installed)

17. STI OEM AVCS hard lines (installed)

18. STI OEM coolant hard lines (installed)

Phone number ✆ 07918 210607
Thaxted, Essex



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