Closed Deck EJ257 V4 Long Rod Short Block

This 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 and pushing coolant that you have with a sleeved block. The V4 is a thicker insert only in the known weaker areas of the cylinder. This adds strength to the bore while not compromising cooling. This block comes machined for ½” head studs.

This engine consists of the following parts:

• Seasoned EJ257 case halves
• Rated to 850 BHP as configured
• Assembled with 2mm Longer rods for a better rod to stroke ratio.
• V4 Closed Deck Process
• JE FSR Pistons
• Outfront Motorsports +2mm Long Connecting Rods W/ ARP 625+ Bolts
• King Performance Bearings
• New OEM Subaru Nitride Treated 2017+ STI Crankshaft
• Machined for ½” head studs
• Rear Covers, Rear Seal, and Pin Plugs Included!!!

No Core required!!

If you have higher power goals or are looking for something different from this block, feel free to contact us to get the correct built block for your application. All of our builds can be completely customized. All of our assembly is done in house in our clean room to ensure excellent quality control. Our Blocks are all bored/honed using torque plates. All tolerances are double checked and all parts are thoroughly cleaned and inspected prior to assembly.