Closed Deck EJ257 V4 Ultra Short Block Forester +8V Sensor power supply

+8V Sensor power supply

Lockout condiitons based on engine speed and throttle position with hysteresis

Intercooler Spray Control

larger internal fillet and reinforced skirt

Closed Deck EJ257 V4 Ultra Short Block Forester +8V Sensor power supplyThis closed deck block design has been proven to withstand extreme boost levels resulting in high cylinder pressures without the worry of cracking a sleeve. The billet material that reinforces the combustion area has been further optimized with our V4 closed deck block in the known problem areas making it a far superior product to any sleeved block. With a closed deck block the stock sleeves are still in place eliminating all risk of dropping sleeves