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IAG Performance 600 Long Block 600 Long Block Engine w/ Stage 2 Heads

Engine Long Block


IAG 600 Long Block Engine w/ Stage 2 Heads for 08-21 STI.

  • These engines offer significant ease of installation for customers seeking a complete "drop-in" engine package for their WRX, STI, Forester XT or Legacy GT.
Pricing: $10,449.99

Free ground shipping on all order over $100.00 (some exclusions may apply)


Subaru: WRX STI 13 - 21 Sport-tech / Tsurugi Edition / Launch Edition / Sport / Base / Limited / Series.HyperBlue / Kanrai Edition / STI / Type RA / S209, Subaru: WRX 12 - 16 STI, Subaru: Impreza 08 - 14 WRX STI Limited / WRX STI Special Edition / WRX STI

  • All IAG Longs Blocks are crated and shipped by freight trucks which include lift gate service.
  • All IAG short blocks are balanced and blueprinted.
  • IAG 600 Long Block Engine Includes: Stage 2 Tuff Short Block Includes: Case Halves - Brand new Subaru OEM case halves, bored and honed to 99.75mm. Pistons - IAG-Spec JE 99.75mm Forged Pistons, Ring Set, .210" 9310 Steel Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin) Connecting Rods - IAG-Spec Tuff H-Beam / ARP2000 Rod Bolts. Rod / Main Bearings - ACL or King Race bearings. Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft. Case / Main Bolts & Standard FHI Subaru case bolts. Stage 2 Heads: Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings Machine Porting - CNC Pocket Ported Intake Valves - GSC 36mm (Standard) Intake Valves Exhaust Valves - GSC 32mm (Standard) Exhaust Valves Springs / Retainers - GSC Single Valve Springs & Titanium Retainers Guides - OEM Valve Guides Valve Seals - GSC Valve Stem Seals Lifters - OEM Lifter Buckets Camshafts - GSC Stage 2 Billet Camshafts Multi-Angle Valve Job Machined Cam Lobe Clearance Ultrasonic Cleaning Final Lash Gaskets, Hardware & Accessories: Head Studs - ARP 2000 11mm Set Head Gaskets - OEM Valve Cover Gaskets - OEM Cam Seals - OEM Valve Covers - OEM Wrist Pin Seal, Rear Main Seal & Separator Kit Crankshaft Woodruff Key
  • If the previous engine experienced an internal failure then all oiling components (i.e. cooler, pump, pickup, cam gears, and solenoids, etc) as well as other necessary components as per your installer's recommendations, must be replaced during installation.
  • Please review the PDF document below regarding installation, break-in procedures and warranty information.
  • Power: The IAG 600 Long Block has a power output rating of 600BHP

IAG 600 EJ25 Long Block Engine w/ Stage 2 Heads: The IAG Performance Hand-Built Subaru EJ25 Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. These engines offer significant ease of installation for customers seeking a complete "drop-in" engine package for their WRX, STI, Forester XT or Legacy GT. The Long Blocks feature a combination of our proven IAG Performance Short Block and Cylinder Head packages, along with other race-proven components to complete the assembly. When paired with our Long Block Installation Packages, you have a true plug-and-play solution to get you back on the road, FAST! All components included are BRAND NEW and there is NEVER A CORE CHARGE required. The IAG 600 package is ideal for clients looking for an engine package to support up to 600 BHP applications. The IAG 600 long block features our most popular Stage 2 Tuff short block that utilizes a brand new EJ25 Subaru Case bored and honed to 99.75mm, IAG-Spec JE forged pistons, IAG-Spec H-Beams connecting rods, and OEM STI crankshaft. The block is then paired up with our Stage 2 Cylinder Head Package, which features brand new Subaru WRX STI OEM cylinder head castings that are CNC Pocket Ported to increase flow but maintain spool. The heads include GSC valve train components and GSC Stage 2 camshafts to take advantage of the ported heads. To complete the package, we add an 11mm ARP 2000 head stud set and all required gaskets for the final valve cover-to-valve cover assembly. IAG's Break-in Instructions MUST be followed, and the long block must be professionally installed for the 12 month/12,000 mile workmanship warranty to be applicable.


  • IAG-ENG-4010W
  • IAG-ENG-4010W
  • 887753779021
  • IAG Performance
  • New


Shipping Information

  • Item Requires Shipping
  • 285.0 lbs.
  • W32.0000” x H28.0000” x L46.0000”
  • Free ground shipping on all order over $100.00 (some exclusions may apply)

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