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Outfront Motorsports Closed Deck EJ20 Base Shortblock With Forged Internals

Outfront Motorsports Closed Deck EJ20 Base Shortblock With Forged Internals


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Closed Deck Block Rated to 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 Block is rated to 700 BHP before adding any upgrades.

This engine consists of the following parts:

  • Seasoned EJ20 case halves
  • EJ20 Closed Deck Process
  • Forged Pistons (Default is JE but you can choose other options above)
  • Outfront Motorsports H Beam Rods
  • King Performance Bearings
  • New OEM Subaru Crankshaft 75mm
  • Rear Covers, Rear Main 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.


Piston Options Part Numbers

Piston Option

Part Number

JE 8.5:1 CR (default) 314438
JE 8.5:1 Ultra 361319
Manley 8.5:1 615005-4
CP 8.5:1 SC7400
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