Expected Lead Time: January 2026
Contact Us for Pricing
CJM-ENG-E25-23-201
But we can let you know when it's back in.
CJM Unlimited - SLEEVED CLOSED DECK EJ25
The Ultimate Subaru EJ25 Foundation for Extreme Power
Each unit begins with a brand-new OEM EJ25 case that’s CNC-machined in-house for our proprietary Closed Deck conversion. Billet aluminum inserts reinforce the deck surface and upper cylinder areas — but the real strength comes from our upgraded Ductile Iron Liners, which replace the factory aluminum bores with ultra-strong, heat-resistant sleeves.
These liners provide exceptional wear resistance, thermal stability, and bore strength, allowing the block to handle extreme boost and 1150+ horsepower with confidence.
Key Features
Engineered Without Compromise
Whether for a high-boost street car or a full race build, CJM Pro Mod Sleeved Closed Deck EJ25 delivers the strength, cooling, and precision your Subaru engine needs to push beyond its limits.
Built Stronger. Handles More Power.
Requires:
Features of the CJM Closed Deck Block
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Draw attention to the care and craftsmanship that went into its design and development, setting it apart in terms of quality and attention to detail.
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Achieve superior engine cooling with our advanced CJM closed deck insert, designed with a radial cooling jacket and coolant pass thru holes.
Highlight key qualities of the product, such as the materials, ingredients, or components used. Emphasize durability, reliability, or performance in everyday use.
Draw attention to the care and craftsmanship that went into its design and development, setting it apart in terms of quality and attention to detail.
