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  • MAPerformance EJ25 Stage 3 Shortblock Assembly (Subaru WRX/STI) - Modern Automotive Performance
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  • MAP EJ25 Stage 3 Shortblock Assembly (Subaru WRX/STI)

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    MAPerformance

    MAP EJ25 Stage 3 Shortblock Assembly

    PART#
    Unbeatable Price Guarantee

    ( Honestly, if you find a better price we'll match it. )

    Give us a call to get the best prices and parts for your build. Or, just call us with a cool racing story...either way we're here.

    Email - sales@maperformance.com

    Phone 1-888-627-3736



    $ 6,149.99   $ 6,764.99
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      +1-888-627-3736
    this item typically ships in 4-6 weeks!
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    Stage 3 EJ25 Shortblock

    Modern Automotive Performance won't settle for anything less than the best when it comes to our engine building program and our reputation. Only the best quality components along with specialized machining and assembly techniques for each individual platform are used to ensure the best possible performance and longevity. When it comes to Subaru engines, MAP makes no exceptions.

    MAP Shortblock Measurement and Quality Inspection:

    • OEM Subaru block inspected for case mold imperfections
    • Block is professionally sleeved
    • All bores are measured (Block halves are torqued together)
    • Deck is measured for straightness
    • Inspect and correct main journal alignment (Block halves are torqued together)
    • Rods inspected for correct crank shaft clearance and wrist pin bore clearance
    • Pistons and rings are inspected, measured and verified to be within specification

    MAP Shortblock Assembly Procedure:

    • Honing of cylinder wall to correct piston to wall clearance
    • Piston specific plateau honing for optimum piston ring seal
    • Install rods to crankshaft and verify oil clearance after proper torque procedure
    • Main bearings are installed, block halves assembled and torqued and then oil clearance is verified
    • Ring gap is set specific to engine use to within .001 of the required gap
    • Deck height inspected and verified to specification

    Core Options

    No core? No Worries! Simply select a new OEM EJ25 block below for us to use as a starting point. New OEM blocks require much less cleaning and preparation compared to used blocks, so even though a new block purchased separately would be $1200+ the difference in price here is just $750!

    Why Choose a MAP-built Engine?

    We won't settle for anything less than the best when it comes to our engine builds. We utilize quality components along with specialized machining and assembly techniques for each individual platform to ensure the best possible performance. If we see a gap in regards to acceptable product offerings on the market we often times develop our own like the Ultimate Duty Connecting Rods.

    We thoroughly inspect, blueprint, clean and assemble our engines in a clean room and most of the machine work is performed in house to satisfy our stringent requirements. We have had great success in building countless motors for every imaginable application from the weekend warrior to the all out race car.

    Shipping

    Please Note: that this item does not qualify for free shipping. Shipping methods and charges will be determined when the service is completed and can range from $100-$200.

    This product is built to order. Based on fluctuations in demand build times may vary throughout the year. Please contact an MAP sales representative for current estimations.

    Applications

    • EJ25 Vehicles

    What's in the box?

    • OEM sleeved block
    • Forged Performance Pistons
    • ARP Main Studs (including line hone)
    • Forged Performance Connecting Rods
    • ACL Race series bearings (King XP Series Bearings are also used when applicable)
    • Manley billet crankshaft with your choice of stroke

    Stage 3 EJ25 Shortblock

    Modern Automotive Performance won't settle for anything less than the best when it comes to our engine building program and our reputation. Only the best quality components along with specialized machining and assembly techniques for each individual platform are used to ensure the best possible performance and longevity. When it comes to Subaru engines, MAP makes no exceptions.

    MAP Shortblock Measurement and Quality Inspection:

    • OEM Subaru block inspected for case mold imperfections
    • Block is professionally sleeved
    • All bores are measured (Block halves are torqued together)
    • Deck is measured for straightness
    • Inspect and correct main journal alignment (Block halves are torqued together)
    • Rods inspected for correct crank shaft clearance and wrist pin bore clearance
    • Pistons and rings are inspected, measured and verified to be within specification

    MAP Shortblock Assembly Procedure:

    • Honing of cylinder wall to correct piston to wall clearance
    • Piston specific plateau honing for optimum piston ring seal
    • Install rods to crankshaft and verify oil clearance after proper torque procedure
    • Main bearings are installed, block halves assembled and torqued and then oil clearance is verified
    • Ring gap is set specific to engine use to within .001 of the required gap
    • Deck height inspected and verified to specification

    Core Options

    No core? No Worries! Simply select a new OEM EJ25 block below for us to use as a starting point. New OEM blocks require much less cleaning and preparation compared to used blocks, so even though a new block purchased separately would be $1200+ the difference in price here is just $750!

    Why Choose a MAP-built Engine?

    We won't settle for anything less than the best when it comes to our engine builds. We utilize quality components along with specialized machining and assembly techniques for each individual platform to ensure the best possible performance. If we see a gap in regards to acceptable product offerings on the market we often times develop our own like the Ultimate Duty Connecting Rods.

    We thoroughly inspect, blueprint, clean and assemble our engines in a clean room and most of the machine work is performed in house to satisfy our stringent requirements. We have had great success in building countless motors for every imaginable application from the weekend warrior to the all out race car.

    Shipping

    Please Note: that this item does not qualify for free shipping. Shipping methods and charges will be determined when the service is completed and can range from $100-$200.

    This product is built to order. Based on fluctuations in demand build times may vary throughout the year. Please contact an MAP sales representative for current estimations.

    Applications

    • EJ25 Vehicles

    What's in the box?

    • OEM sleeved block
    • Forged Performance Pistons
    • ARP Main Studs (including line hone)
    • Forged Performance Connecting Rods
    • ACL Race series bearings (King XP Series Bearings are also used when applicable)
    • Manley billet crankshaft with your choice of stroke

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    MAP Limited Lifetime Warranty

    1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

    2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

    3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

    4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

    For warranty evaluation please create a support ticket via this form here.

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    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia or the UK. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

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    Unfortunately due to vendor restrictions we are unable to sell this brand within Australia. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

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    Unfortunately due to vendor restrictions we are unable to sell this brand within California. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

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    Unfortunately we are not able to ship this item outside of the United States.
    If you have any questions please contact us at: 1-888-627-3736 or Email Us Here.