2004-2006 Subaru STI Ej257 with B25 Head Castings

Single AVCS Long Block Stock Rebuild




PRICE IS $5,900 OUTRIGHT. *(no core exchange) Outright price does not include timing, sales tax or shipping

*Core exchange option available (up to $2,200 back!)


Deposit starts at $1,200 before upgrades (goes towards build).

*Credit/Debit card accepted for non-refundable deposit. We will contact you for payment arrangements via wire transfer and/or bank deposit only. Payment installments can be arranged!


These Stock Builds come with High Performance Special Anodized and MOS2 Coated Pistons with the Stronger Ring Lands, and include custom CP Pistons Gas Nitrated High Performance Piston Rings. They also come with King or ACL Main Bearings and  Rod Bearings with reconditioned rods and and a OEM crank.


*Stage Up Packages Ready to Machine and Build per custom order*


We completely rebuild, machine, inspect and clean these blocks in-house using new stock aftermarket pistons, rings, recondition rods, rebuilt balanced crank, new aftermarket main and rod bearings.


The parts we use have a compression safe stock OEM spec with an overall longevity and higher output rating than factory. 


We do have all EJ engines in stock!


Core exchange option: RECEIVE UP TO $2,200 BACK for this Better Than Stock Package with the return of your old, rebuildable core. Core Deposit of $2,200 (included in price) is refundable after we receive the core and inspect it for damages within 30 days. Customer must pay for core shipping. Call us for any questions about core exchanges.

*Bad crank core charge may be applied if we have to replace the crank upon inspection.



Shipping will not be charged during this online purchase, it will appear as “free” during the check out page but the charge will be calculated, added on to your invoice and balance will be due once your order has been completed. Depending on your location, shipping can take 1-2 weeks. The tracking number will be provided upon request.


Prices may change due to part fluctuation at time of order.


Get started by calling us at 1-877-GCH-SUBI (1-877-424-7824)

Or message us here or email us at: georgescylinderhead@gmail.com


Looking to finance through Affirm? Follow this link to get started!

$5,900 (2004-2006) Subaru STI "Better Than Stock" Long Block

PriceFrom $1,200.00
  • We have three generations of engineering and craftsmanship in the field of stock and high performance machining and building.


    Everything is built in house, and our team has control over what leaves our shop.


    Each block goes through our rigorous inspection from start to finish, and we measure and inspect everything inside and out to make sure we are always within perfect tolerance levels. Our team makes all needed adjustments.