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Free shipping is available within the lower 48 states for orders totaling $199 or more. Simply select the free shipping option during checkout. Even though expedited shipping is not free we will still discount the free shipping option from the expedited shipping cost for you. This offer excludes shipments going to Alaska, Hawaii, Military Boxes, and items too large to ship via UPS or USPS. These items are usually large freight or bulky items such as engine blocks, etc.

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  • STi Shortblock EJ257 (OEM Subaru WRX / STI Replacment Engine) - Modern Automotive Performance
  • STi Shortblock EJ257 (OEM Subaru WRX / STI Replacment Engine) - Modern Automotive Performance


    STi Shortblock EJ257 (OEM Subaru WRX / STI Replacment Engine)

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    PART# SUB 10103AC890 
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    $2,335.11

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    STi Shortblock EJ257 (OEM Subaru WRX / STI Replacment Engine) - Modern Automotive Performance

    2008-2014 OEM Subaru STI EJ257 Short Block

    This 2.5L EJ257 shortblock that comes as standard issue in the USDM STi will easily swap into nearly any Subaru Impreza WRX or STI with a turbocharged 4 cylinder motor. It is an excellent choice for any Subaru WRX (EJ20) owner looking for an increase in displacement and torque. In its stock form, this block is capable of reliably supporting 465 crank HP and can be easily built to withstand more power. When coupled with the stock Subaru WRX heads, more torque and power will be realized but the the true potential of this EJ257 short block will be unleashed with upgraded cams and valvetrain.

    This brand new, completely assembled, Subaru OEM EJ257 short block is ordered directly from Subaru. This Subaru WRX / STI short block is ready to go right out of the crate. Simply bolt on your cylinder heads (WRX or STI) and accessories and it is ready to be installed in your car.This is the OEM short block that came in the 2011+ STI. This has the better crank (induction hardened) and not the nitrided crank shaft that was in earlier motors.

    This item is superseded from part # 10103AC050

    2008-2014 OEM Subaru STI EJ257 Short Block

    This 2.5L EJ257 shortblock that comes as standard issue in the USDM STi will easily swap into nearly any Subaru Impreza WRX or STI with a turbocharged 4 cylinder motor. It is an excellent choice for any Subaru WRX (EJ20) owner looking for an increase in displacement and torque. In its stock form, this block is capable of reliably supporting 465 crank HP and can be easily built to withstand more power. When coupled with the stock Subaru WRX heads, more torque and power will be realized but the the true potential of this EJ257 short block will be unleashed with upgraded cams and valvetrain.

    This brand new, completely assembled, Subaru OEM EJ257 short block is ordered directly from Subaru. This Subaru WRX / STI short block is ready to go right out of the crate. Simply bolt on your cylinder heads (WRX or STI) and accessories and it is ready to be installed in your car.This is the OEM short block that came in the 2011+ STI. This has the better crank (induction hardened) and not the nitrided crank shaft that was in earlier motors.

    This item is superseded from part # 10103AC050

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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. 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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