Left Subaru 2.5 SOHC Non-Turbo Cylinder Head – Casting # E25S

Remanufactured Subaru 2.5L SOHC Non-Turbo Left Side Cylinder Head Casting # E25S

Professional Grade OEM Replacement Cylinder Head – Left Side

Restore your Subaru’s signature boxer performance and thermal efficiency with this professionally remanufactured left-hand (LH) driver-side cylinder head. Specifically engineered for the naturally aspirated 2.5L SOHC (EJ25) engine series, this head features the critical E25S casting identifier. Precision-machined to meet or exceed original equipment (OE) dimensional tolerances, this unit is designed to restore factory-spec compression and provide a superior head gasket seal—the most vital factor in EJ-series engine longevity.

Every cylinder head undergoes a rigorous multi-stage remanufacturing protocol—including ultrasonic cleaning, precision deck resurfacing, and high-pressure leak testing—to eliminate potential failure points such as the thermal warping or cooling passage corrosion common in high-mileage Subaru castings. This E25S head is designed to restore peak volumetric efficiency and smooth idle characteristics, providing a cost-effective, durable solution for refreshing your engine. Whether you are performing a top-end overhaul on a Forester, Impreza, or Outback, this remanufactured LH head provides the structural integrity and cooling capacity required to regain your Subaru’s original reliability.

🛠️ In-House Machining Process

• Cleaning: Fully disassembled and thermally cleaned.
• Soda Blasted: Castings are blasted with Sodium Bicarbonate. Because baking soda is water-soluble, there is zero risk of abrasive media clogging oil passages.
• Pressure Testing: Tested to 60 PSI to ensure no cracks or porosity leaks.
• Surfacing: All heads are resurfaced on our Rottler S85A for a precision gasket-sealing surface.
• Valve Job: Multi-angle valve job performed; every port is Vacuum Tested to ensure valves are seated 100% airtight.

📊 Technical Specifications

• Engine Size: 2.5L
• Engine Type: SOHC (Non-Turbo)
• Casting Number: E25S
• Position: Left Side (Driver Side)
• Each Cylinder Head Includes: Valves and Springs Installed, Camshaft Installed, Bucket Lifters Installed and Lash Set

🚛 Fitment Data

Common Applications:

• Subaru Forester: 2008–2010 Subaru Forester (2.5L SOHC Non-Turbo)
• Subaru Impreza: 2008–2011 Subaru Impreza (2.5L SOHC Non-Turbo)