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This Block Is Our V3 Closed Deck EJ257 Ultra With Je Ultra Pistons and Boostline Rods. This short block is the go to for 700 BHP.

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 V3 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.

This engine consists of the following parts:

  • Seasoned EJ257 case halves
  • V3 Closed Deck Process
  • JE Ultra Pistons (Grain Flow Optimized Forging, Lateral Gas Ports, Ceramic Crown Coating, Perfect Skirt Coating, Accumulator Groove, Double Broach Pin Oiling, Upgraded 9310 Pins and locks, Carbon Steel Nitride Rings)
  • Boostline Connecting Rods W/ ARP 2000 Bolts
  • King Performance Bearings
  • New OEM Subaru Nitride Treated 2017+ STI Crankshaft
  • Rear Covers, Rear Seal, and Pin Plugs Included!!!

No Core required!!

Closed Deck EJ257 V4 Ultra Short Block

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