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Prime Motoring Phase 3-X EJ25 Closed Deck Shortblock (P3X)

Prime Motoring Phase 3-X EJ25 Closed Deck Shortblock (P3X)

Prime Motoring Phase 1-X (P1X) EJ20 Closed Deck Shortblock

Prime Motoring Phase 1-X (P1X) EJ20 Closed Deck Shortblock

Prime Motoring Phase 2 (P2) EJ20 Shortblock

Prime Motoring Phase 2 EJ20 Shortblock
In stock

You asked for it, we built it! Prime Motoring joined forces with Outfront Motorsports out in California to design engine packages for the EJ25, FA20, and even EJ20 platforms. Each engine is machined & assembled by Outfront Motorsports to our specifications. Each engine is built to what we want based on what we've learned from our experiences in drag racing and from our customers. We wanted to offer engine packages that were not influenced by profit margins and pure sales volume. We wanted something built BY the community FOR the community.

This is an EJ20 engine! Engine will only work in EJ20 equipped vehicles.

  • EJ205
  • EJ207
  • EJ20x/20y
  • etc. 

Phase 2 EJ20:

  • Case Halves - Seasoned EJ20 Case
  • Pistons - Custom Outfront Motorsports/JE Piston Forged Piston Set (92.5mm Bore) with Thick-Wall Wrist Pins
  • Connecting Rods - Custom Outfront Motorsports +2mm H-Beam Connecting Rods
  • Rod / Main Bearings - King Bearings
  • Crankshaft - Standard New Subaru EJ20 Crankshaft
  • Case / Main Bolts - Standard FHI Subaru case bolts

*EJ207/Spec-C Crank Available*


Power: This shortblock is rated to 575BHP


Warranty Information:

All short-blocks are covered by Outfront Motorsports’ 6month/6,000mile warranty. This warranty only covers manufacturing defects, workmanship, & assembly. Failures caused by improper installation, tuning, maintenance, or driving habits are NOT covered by warranty. ALL warranty claims must be submitted to Prime Motoring & Outfront Motorsports. Engines must be taken apart by Prime Motoring/Outfront Motorsports as a long-block to fully assess any outside errors and the full extent of damages.

Warranty Limitations:

-       ONLY applies to short block components assembled by Outfront Motorsports.

-       Does NOT cover any other part of the engine, turbocharger, accessories, or even the vehicle itself.

-       Warranty does not cover labor expenses.

-       Warranty is only offered if the short block is professionally installed by a reputable shop that Prime Motoring recommends and tuned by tuner that Prime Motoring recommends. (list TBD)

-       Owner is responsible with supplying proof of proper maintenance.

-       There is NO warranty on customer supplied components.

-       All shipping costs are the responsibility of the customer.

-       The customer is responsible for all disassembly and reassembly costs if warranty claim is denied.

As of right now 01/01/2019, all Prime Motoring short blocks are to be installed by Prime Motoring and tuned by JRTuned. By Fall of 2019, the current list of authorized tuners & installers will be added.


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