750 EJ20 Closed Deck Case

The IAG Performance 750 EJ20 Closed Deck Case is a critical upgrade for Subaru EJ20 engines, offering significantly enhanced strength and reliability. This closed deck case design, featuring 11mm head stud machining, is engineered to withstand higher power outputs and demanding operating conditions compared to factory cases. It serves as a robust foundation for both performance street and track-oriented builds. This case is designed as a direct replacement for Subaru WRX, STI, Forester XT (FXT), and Legacy GT (LGT) models that utilize the EJ20 engine. Its construction aims to reinforce the weakest points of the standard engine block, providing a more resilient platform for aggressive tuning and increased boost levels. The 11mm head stud machining further contributes to improved cylinder head clamping force, essential for maintaining seal integrity under high stress. This product is sold as case halves only and typically requires machining services such as boring and honing to be performed before assembly. Buyers should consult with their engine builder or a qualified performance shop to ensure proper preparation and installation. The IAG 750 EJ20 Closed Deck Case is an investment in the longevity and performance potential of your Subaru's engine.