Crawford Subaru EJ255 EJ257 Long Block

Built to order. This motor is built to order in our shop — not pulled off a shelf. Current lead time: 2–4 weeks from your order date. Built-to-order motors are final sale.

Crawford Subaru EJ255/EJ257 Long Block (2004–2021) — Up to 770 HP

The Crawford EJ255/EJ257 long block is a complete, hand-assembled engine for 2004–2021 WRX and STI, built in our shop from a brand-new OEM short block — no core required, no core charge, no used case put back in service. Every build uses CrawfordSPEC forged internals, developed with JE Pistons and Pauter Rods, and is rated by tier up to 770 horsepower.

Pricing includes reconditioning your heads: every long block includes the Crawford Essential Cylinder Head Service — inspection and prep of the heads you send us — so the top end that goes on your new block is known-good, not a guess.

Crawford has built Subaru engines for over 30 years. These are the same build programs behind our Gymkhana cars and Subaru of America motorsports work.

EJ255 or EJ257 — Which One Is Yours?

Same build, two foundations. If your car is a WRX, its turbo EJ is the EJ255. If it's an STI, it's the EJ257. Pick your engine and your power tier below — the internals package is matched to the rating. Not sure? The reading list at the bottom of this page includes our EJ255 vs. EJ257 guide, or call (855) 677-8243.

Choose Your Power Rating

Crawford Street Spec (CSS 540)

• Rated up to 450 whp (540 bhp)
• New OEM short block – no core required
• CrawfordSPEC CSS JE Forged Pistons (SCCA-approved and stamped)
• Upgraded race-proven bearings
• Crawford Essential Subaru Cylinder Head Service Inspection & Prep

Crawford Club Racer (CCR 660)

• Rated up to 550 whp (660 bhp)
• New OEM short block – no core required
• CrawfordSPEC CCR JE Forged Pistons
• CrawfordSPEC X-Beam Pauter Billet Rods
• Upgraded race-proven bearings
• Crawford Essential Subaru Cylinder Head Service Inspection & Prep

Crawford Racer Spec (CRS 720+)

• Rated up to 600+ whp (720+ bhp)
• New OEM short block – no core required
• CrawfordSPEC CRS FSR Billet Forged Pistons (Forged Side Relief)
• CrawfordSPEC Forged Rods
• Upgraded race-proven bearings
• Crawford Essential Subaru Cylinder Head Service Inspection & Prep

About CrawfordSPEC Pistons

Developed exclusively with JE Pistons, every CrawfordSPEC piston is designed with:

• Exclusive dish design for stronger combustion and efficiency.
• OEM bore size of 99.5mm (no oversized pistons needed).
• Increased vacuum, lower crankcase pressure, and more power at the same boost.

📖 Learn more in our blog about why oversized pistons aren’t the best choice for rebuilding your EJ motor.

About the FSR Piston Upgrade

Our Forged Side Relief (FSR) Billet Piston is engineered for high horsepower road and drag race engines. Features include:

• 100% CNC-machined from 2618-T6 aluminum bar stock.
• Internal and external bracing for rigidity and weight reduction.
• Up to 32 grams lighter than traditional forgings.
• High-quality 9310 steel wrist pins.
• Reduced skirt width for less friction and power loss.

About CrawfordSPEC Rods

Developed with Pauter Rods, CrawfordSPEC rods feature:

• Longer than stock length for improved rod ratio and smoother power delivery.
• Billet 4340 chrome-moly steel, the strongest in the industry.
• Engineered exclusively for Subaru EJ applications by Crawford Performance.

Order Your Crawford EJ257 Long Block

When you choose a Crawford Subaru Long Block, you’re getting:

• A brand-new engine build — no core required.
• Race-proven forged internals engineered for your target horsepower.
• Motorsport-grade craftsmanship trusted by Subaru of America and Ken Block.
• A precision-assembled long block capable of 500–770 horsepower with proper tuning and maintenance.

Installation

Don't want to install it yourself? Crawford installs its motors at our East Coast facility. Call (855) 677-8243 to schedule.

Questions Buyers Ask

Is this a crate engine? No. Crate engines sit on a shelf. Every Crawford long block is built to order for the car and power target it's going into — that's the 2–4 week lead time, and it's why the internals match your rating instead of a generic spec.

Do I need a core? No. Every build starts from a brand-new OEM short block. No core charge, no core return.

What happens with my heads? The price includes our Essential Cylinder Head Service: your heads are inspected and prepped, then reconditioned as needed and assembled onto the new block.

What does shipping cost? Crawford-built long blocks ship free.

How do I break it in? Oil changes at 500 and 1,500 miles. Keep engine speed between 2,000 and 4,500 RPM, varied — no sustained cruising, no full-throttle pulls, and no more than 80% of target boost until break-in is complete. The first oil analysis is mandatory — it's a condition of the warranty.

What warranty does it carry? 1 year / 12,000 miles, with 24- and 36-month extended coverage available — full terms in the warranty section below.

Built to order. Crawford Long Blocks are built to order. Current lead time: 2–4 weeks.

Warranty

Every Crawford built motor includes a 1-year / 12,000-mile warranty. Extended 24 and 36-month coverage is available — see the Motor Warranty page for terms.

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.

Forged or cast? When it actually matters.

New built motor? Break it in right.

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. Extended coverage for this long block: 24 months — $1,299 · 36 months — $1,999. Buy extended coverage.