Crawford BTO Subaru EJ257 Short Block | Upgraded Bearings

Crawford BTO EJ257 Short Block — Better Than OEM

The replacement, done better than stock.

We start with a brand new, genuine Subaru OEM EJ257 short block (Part #10103AC870) and swap all the bearings for better bearings. Same factory block, crank, rods, and pistons. Stronger where stock is weak.

This is not a built motor. No forged internals, no power claims beyond stock. If you want power, buy a Crawford built block. If you need your car back, buy this.

• New genuine OEM short block, Part #10103AC870
• All bearings swapped for upgraded bearings, done by Crawford
• $3532.47 — the stock block with its weak point fixed, done by Crawford. Substantially less than a built block.
• Fits: WRX STI 2004–2021 (also EJ257 applications in Forester XT, Legacy GT, Outback XT — see the OEM EJ257 listing for the full fitment list).
• Do the job once: 2008–2021 EJ25 Short Block Installation Kit (kits for earlier years are listed separately).

Turnaround: Standard — the bearing swap is done in-house before it ships. Quick turnaround is the point of BTO.

Expedited (+$500): Choose Expedited and it ships within one week, as long as the parts are in stock.

Shipping: Motors pay live carrier rates. No free shipping on motors.

BTO by Crawford Performance — Better Than Original: the stock replacement with its known weak point fixed by Crawford before it ships. Built for drivers. Not focus groups.

Want it exactly as Subaru built it instead? See the standard OEM EJ257 short block.

Read first: Everything You Need to Know About Your Subaru Engine — Crawford's engine guide.

Step four of our reliability recipe is an Air/Oil Separator. Here's why every Subaru engine needs one.

EJ255 or EJ257? Which block is right for your build.

Read: What actually kills EJ motors.

Our motors are built to order. What that actually means.

Warranty. This engine carries Crawford's 12-month / 12,000-mile warranty. Extended coverage is available: 24 months — $599 · 36 months — $899 (long blocks: $1,299 / $1,999). Written break-in and a first oil analysis are mandatory warranty conditions. Full terms: the warranty page. Buy extended coverage.